Stretch-Reach Codes (Text Version)
Good afternoon. My name is Isaac Elnecave. I am the Senior Policy Manager at the Midwest Energy Efficiency Alliance. And welcome to todayâ€™s webinar on stretch codes. This is part of the DOE technical assistance program designed to help people with issues around energy codes, green design, building policy in general. I will be speaking for the next hour, between now and 2pm central, because Iâ€™m in Chicago, or 3pm Eastern as the time says.
I plan to speak for about 45 minutes and then leave about 15 minutes or so for questions. Feel, of course, feel free to ask questions you can. My general rule on that is I think I can usually answer most questions, but any questions that I cannot answer, I will absolutely get to the questioner with an answer, as soon as possible usually within the next day or so. So, let me begin. Oh no. So, first of all, the table of contents, Iâ€™m going to first talk on, a little bit on the actual DOE technical assistance program and then launch into stretch codes. More or less, I want to just describe what the technical assistance program or TAP is, what it provides and the resources that are available to you.
Afterwards, I will launch into a general discussion of stretch codes, what they are. I will focus though, somewhat on the discussion of the Massachusetts Stretch Code, particularly, because I was very involved in its development. And then, end with some short notes on some alternate versions of stretch codes, particularly some that are coming that are in the form of green codes. So what is TAP? And the technical assistance program is it supports the EECBG, the Energy Efficiency and Conservation Block Grant program and the state energy programs.
And the idea is to provide resources, and tools and the like to implement clean energy programs. A lot of what weâ€™re dong recently has to do with, again, green buildings, green design, codes and the like because among other things there is a tremendous amount of interest both in the adoption and the implementation of regular codes and then the adoption and implementation of stretch codes, so.
Hold on one second. So, some of the things the technical assistance program offers is one on one assistance, we include webinars, a blog, we facilitate peer exchanges, and we really are focused on things that are capacity building. Technologies, program design and implementation, financing, performance contracting, so we are really trying to cover the gamut of issues that are involved in moving forward clean energy programs.
So, to go into the resources, there is two places where you can go and the first one is the solutions center and the second one is the more fun one which is the technical assistance center where you can submit a request, a question, and it will get submitted depending on the type of question and where you are to one of a general set of experts either within the Department of Energy or among regional emergency efficiency groups, for example, such as the Midwest Energy Efficacy Alliance, where I work. The Northeast Energy Efficiency Partnership __ in the Northeast. The Southwest Energy Efficiency partnership, etcetera. As well as other places like the Pacific Northwest National Laboratories, which is the technical arm of the department of energy, so these are available resources for you and again you can ask questions at the phone number at the bottom of the page.
These are very, very useful. Iâ€™ve already answered questions on several issues already. And we strive to be as not only as accurate, but as timely as possible on them. So, and I want to end this section of the webinar by telling you about some of the other ones that are coming. One that is really near and dear to my heart will be on the 24th of September, where they will be talking about green codes and programs from the Southwest Energy Efficiency Alliance suite.
But as you can see, there are several other ones all, there is at least six more till the end of the month. So they are coming fast and furious particularly dealing with issues such as performance contracting, how to get demand for home energy improvements and the like. Maybe you are on this and you are aware of these, and we hope to see you in future efforts.
So let me now move into the stretch code section of the webinar. And I, again, as I said, I first want to have a general discussion on stretch codes and I want to emphasize that since this is going to be a more or less 40 to 45 minute presentation on the issues, Iâ€™m not going to get into the real detailed, technical, specifics that are incorporated in stretch codes. That could be either for a future webinar or I would certainly, if anybody wants to email or call me on these issues, I would be happy to talk to you about in more depth.
More or less what I am to do on this is provide a sense of the policy background on how stretch codes get developed and what are the basic features with in a stretch code. More or less, this is in many ways, a way to as much, pique your interests on this issue as to get into too much detail. Again, to go into real detail would be a multi-hour webinar which generally nobody really ever wants, so let me first define what I mean by a stretch code and sometimes it goes by the term above code, which means above the energy efficiency of a regular code or a reach code. I will focus on talking about this as a stretch code.
And itâ€™s really a code that results in more energy efficient buildings, on average, than the locally enforced energy code. What I mean by that is that typically states set a state energy code and that happens in the vast majority of states in the country including most of the states in the Midwest, however, very often, and Iâ€™ll get to this point, jurisdictions and municipalities, or even individual buildings of the like want to do something more and then the question becomes how do you set up a code or a set of rules, which is what a code is, that help people know that theyâ€™ve built something more energy efficient than the predominate state code, but that they also know would meet the requirements of the state code, in other words, you donâ€™t want to just go and build something that you think is better without knowing that itâ€™s actually going to be meet the general state code because you always have to meet the very basics.
Now, like I said, the locally enforced code, is typically going to be the national model codes, and I mean by that the international energy conservation code. The IEEC, sometimes the international residential code, the IRC Chapter 11, and for commercial buildings it would be the Ash___ 90.1 standard. That implies, again, the vast, vast majority of states in the country.
Some states do go their own way and do not follow the national model codes, states such as California, Oregon, and Washington. But even in these cases, a stretch code would mean in effect, a code thatâ€™s more stringent then the California statewide code, or the Oregon statewide code. The reason that people want to adopt stretch code are very straightforward and one of them, the one that I think really drives a lot of it is desire by communities to go to more efficient codes.
We know that a lot of states here in the Midwest, you have a state code, but for example, a city like Chicago had itâ€™s own code and it worked hard to be more energy efficient than what is now the state code. Other cities around Illinois for example, like Evanston and Oak Park follow the same approach and many times, again you get the question from communities that we as a community want to have a code thatâ€™s more stringent than the state code. And itâ€™s very important to remember that while states often set the baseline code, enforcement of the code happens at the local level.
State officials do not normally enforce the code. In other words, both the building official, the one, the person who reviews your plans and your construction drawings as well as the people who actually inspect the buildings are generally hired by the jurisdiction. So itâ€™s the City of Chicago Building Inspector, the city of Evanston Building Inspector, the City of Madison, Wisconsin, etcetera. So, if these communities do want to go, then they, in many ways, often are the ones who are able to go more energy efficient and have the resources and even in todayâ€™s recourse constrained world to do so.
Another reason to adopt a stretch code is when state provides incentives. A state like Massachusetts and I will get into this a little bit more later, passed a law called the Green Communities Act which said, which basically said that jurisdictions within the state that are designated as a green community would have access to state funds. And to be designated a green community, one of the things that a city has to do was to adopt a stretch code. This was really a very big driving impetus for the involvement of the Massachusetts stretch code.
Another reason is to provide guidance for future energy codes. I think itâ€™s important to think of energy codes in the sense of a ladder in which youâ€™re constantly moving forward, moving up in the direction of more energy efficient buildings. However, as everybody knows, it takes a while when you set a code, it takes a long while to get everybody to understand it, build to it and eventually, enforce it. Architects, builders, engineers, code inspectors, developers. It takes a while for doing this so what a reach code can do, oh, excuse me, what a stretch code can do is show builders and engineers and architects whatâ€™s coming and for those progressive builders and engineers that want to build more energy efficiently this provides guidance as to what maybe coming in the next baseline code, statewide code.
And it helps people learn the techniques, and the construction techniques and the requirements that will be coming up in the future. And finally, it gives the opportunity to train the building and development community in advanced building practices. So for a, as we will go forward one thing that is coming up in stretch codes is the use of commissioning, which hasnâ€™t been a very big part of codes in the past, of energy codes in the past. And I do have stretch codes. You now start moving into issues such as teaching people and people start getting comfortable with developing good commissioning practices during their building, during the building. And good commissioning practice and building inspectors and building officials get to know how to do this.
Let me get to some of the key attributes of a stretch code. What should be a part of a stretch code? What makes a stretch code a good thing and why do we want to do it? And what would make a stretch code a good code? First of all, we would need to find ways to ensure that it generates more energy savings than the locally enforced code. Thatâ€™s the basic definition, but beyond it generating more energy savings, a stretch code, a reach code needs to be buildable. In other words, you canâ€™t just put in any stretch code you have to think through and make sure it is something that is consistent with good construction practices.
Stretch code must also be enforceable. It must be something that building officials and plan checkers and everybody involved in the enforcement community can actually check. It should not just be something so in many ways, overly complicated or overly esoteric that itâ€™s not meaningful. Again, and Iâ€™m going to be coming back to this point over and over again, I think. It should be designed to become a regular code in subsequent code adoption cycles. It should incorporate new requirements, whether more stringent, requirements that are more stringent than what are currently in the statewide code, or new requirements that should be designed and should be though through so that it can be adopted in future code adoption cycles.
And finally and this goes back to the third point, you have to be able to design the training and enforcement protocols and systems for it. Again, a stretch code that you canâ€™t train to because itâ€™s either so complicated or so esoteric is not a useful stretch code at all. In the end, and I think just to this first portion of the webinar, think of stretch codes as moving the bar and raising the bar. Moving up the steps of the ladder. It helps professionals learn new tools, shows them whatâ€™s coming and it also, I think to the broader populace to consumers, to home owners, to builders to developers that shows as jurisdictions adopt a particular stretch code, it shows that it can be done.
Again, that ties back into it should be designed to be adopted in future code cycles. Well, if you can show that it can be done and you can show that it can be done cost effectively than you can see that the stretch code, while also being more energy efficient, generating more energy savings, can be adopted as the general code. It also helps move the bar on energy efficiency programs for new construction. Many times these are the, these energy efficiency programs really try to set the feeling in many ways, the best, really push the envelope on good energy efficiency construction.
Well, in a sense you have the statewide code and if the stretch code starts pushing up on the limits of what the energy efficiency programs are, then it forces the energy efficiency programs to themselves move up in terms of energy efficient construction and design. So it constantly pushes the energy efficiency programs, not to stay static, not to become complacent, but really forces the people who design these programs, to themselves, to themselves, keep moving the bar up. And hopefully, in the end, all of this work guides the way to net zero energy buildings.
Now, for the implementation of a stretch code, again, a stretch code, Iâ€™m defining as a code that is more energy efficient than the statewide code, and generally to be adopted by jurisdictions and local municipalities and local jurisdictions within the state. In many places, state laws allow local jurisdictions to adopt the stretch codes, sometimes under restrictive conditions, but in a state like Illinois, for example, you can adopt a stretch code if you are more, you can adopt a code that is more energy efficient than the statewide code. But in others, but there are other states and let me add that in those places, again, you can have the local jurisdictions decide what to do in terms of adopting a stretch code. However, in some states there are laws that prohibit jurisdictions from adopting a code other than the state code.
Up until very recently Massachusetts was a state like that. Rhode Island was another state, in fact, many states in New England and with an eye towards having one code through out the state really do prevent local jurisdictions from adopting a stretch code or even, and in some cases also, as Iâ€™m calling it a Min/Max provision, adopting a code that is less stringent than the state wide code. In these situations, you can still develop a stretch code, but in these cases you should think of a stretch code in many ways as something that we call an informative appendix. In the sense, in addition to the state code, but that is not enforceable, but by incorporating an informative appendix you give a guide so that as energy efficiency programs are developing their new construction practices they can see what to build too.
Often, state law allows public buildings to build to their own specific standards and a stretch code as an informative appendix would allow, would give a guidance for that. And finally, if you incorporate a stretch code and informative appendix as part of your code again, as a separate section to the code, it provides guidance to the building community. It goes back to that question, if you are an engineer or a builder who wants to go above the state wide code, this is the sort of information you can use because it is a code. It would be, if you build to this code, you would meet the requirements of the state wide code, but in addition you are using a code that will generate more energy savings.
So, the types of stretch codes that I would like to refer to are three for the moment. One is the Massachusetts stretch code, so Iâ€™ll be talking about more in a second. Ashray standard 189.1 which is a commercial green code and the California green standards code, Cal Green as they call it which is both, a residential and a commercial code. I want, very much, to stress two things. Number one, Ashray and Cal Green are green codes, which means that they cover issues beyond energy efficiency, such as water efficiency for example.
So they are much broader than scope, but they do incorporate an energy efficiency chapter, which functions as a stretch code. And thereâ€™s another code thatâ€™s under construction the international green construction code, which is being developed by the international code council which is the same organization that develops the international energy conservation code. And it is like I say, itâ€™s still under construction. They are working on version, I believe, 2.0, which should be out in November 2010. And which will cover both residential and commercial requirements.
Finally, a word on green ratings systems. I always like to emphasize this point, green building ratings systems, such as LEAD or the National Association of Home Builders, the NHB national green building standards are not appropriate as stretch codes. In a sense, rating systems such as LEAD are designed to give maximum flexibility so that you can really push the envelope on green building design and construction. However, there are often, because of this inherent flexibility that is incorporated, you often donâ€™t have a huge amount of control on the energy savings side of this. And so things such as LEAD while very useful in guiding green construction practices in general, really do not function well as a code.
Again, if you want to think through green energy codes, like Ashray 189.1 and CalGreen from California offer much better examples. And this also will go back to the point I would like to emphasize that energy codes set the floor for energy efficiency, energy efficient design and construction. In other words, as we like to say, the worst home that legally can be built, so in a sense, if an energy code is the worst home that can be built then you have a stretch code which means, that you have now set a much better worse home.
And then you go into LEAD and things like the NHB, National Green Building standard and youâ€™re moving in a different realm in terms of energy efficiency, because now you are incorporating so many more options into your construction. So really, going back, really focus on the Mass stretch code, Ashray standard 189.1 and the California Green Standards code, CalGreen.
Let me go into the Massachusetts Stretch Code. It was developed in response do the call from towns and cities for a stretch code and this was because both because there are a number of progressive communities in Massachusetts, obviously itâ€™s the home of Cambridge, Massachusetts among others, but North Hampton in the western part of the state are others and also because, as I said, the green communities act incentivized the use of stretch codes.
So, and this is another important point to talk about as we are talking about stretch codes, included several options. It included the Ashray advanced energy design guides, LEAD, the new buildings institute core performance guide. None of those having been designed really as codes, and in fact, they were, in man ways, overwhelming the building community with alternatives. And this goes back and this is, again important to emphasize, the reason Massachusetts originally had put their law in that there would only be one state wide code, is in a sense reduce confusion and reduce complexity. A builder, builders were not opposed to the code, they just wanted one code that they could build too and that makes things, simplifies their process, their work.
So having several different codes really just complicated things unnecessarily. So one of the things that happened is that the state eventually settled on one residential code and one commercial code to avoid having that multiplicity. So in a sense if a local jurisdiction wanted to have access to green communities act money, it would have one, it would adopt the residential stretch code and the commercial stretch code and there would be one that they would have to adopt. They would either adopt it or not adopt it.
They wouldnâ€™t get a choice of six different stretch codes. And one of the final things and because they only had one residential stretch code and one commercial stretch code the regulatory body, the board of building regulations and standards has been able to design training and they have designed training for both just the baseline, the statewide baseline code and the stretch code, but if they had to do numerous codes and numerous standards to do this, it would have become an overwhelming and un-, impossible to fully train and develop a training protocol for it.
So, an important point about doing all of this is that if you are doing this as a stretch code, while it is jurisdictions that adopted, you really do not want jurisdictions to go in several different directions. You should set statewide policy that says, you either adopt a statewide code, you either have to enforce the statewide code or you adopt a stretch code. But in some ways, you have to maintain the balance between giving jurisdictions the option to adopt the stretch code, but not giving too much flexibility and overwhelming again, builders, code officials, and everybody else involved in the process.
So, let me talk a little bit about the residential stretch code in Massachusetts. It requires a HERs rating of 65 or 70 depending on the size. The tougher rating is for home 3,000 square feet or greater recognizing in a sense two things that one, the bigger the home, the more opportunities you have to incorporate energy efficient features and improve your HERs rating. And also, in a sense, it does provide a small little bit of incentive for not building homes quite so large. This is roughly about 15 to 20 percent more energy efficient than the 2009 international conservation code, which is the statewide code right now in the state of Massachusetts.
And if, there was a number-, quite a bit of analysis done as to what this level of HERs rating would generate. And that it said, basically indicate that it would require a much tighter home, about as tight in terms of air changes per hour as even a code home. It would require much less leakage from the ducts, much, much, it would have very tight ducts. It would mean because you have such a tighter home and tighter ducts, likely an addition of mechanical ventilation system and it would incorporate the use of high efficiency heating and cooling equipment, water heaters and the like. These kinds of measures would generally get your home to the HERs rating level. And I just want to emphasize that a HERs rating is a system developed by the ____. At this moment, itâ€™s basically an index from 0 to 100, 100 being equivalent to the 2006 international energy conservation code.
The 2009 energy conservation code represents a HERs rating of roughly 85, a rating of 0 would be a net zero energy home. So that is the residential energy code. Let me get into the commercial stretch code which is a little bit more complex. The commercial stretch code is two paths, there will be a prescriptive path and a performance path. A prescriptive path, in a sense, is as many, Iâ€™m sure you know, is the, is basically a cookbook approach in which you have a requirement for insulation, windows building tightness lighting requirements that are spelled out and you meet all those.
You in a sense do a check list on the requirements and if you, once you finish that youâ€™ve met the requirements of the code. In this case, the prescriptive path is based on the standards developed by the core performance guide, which was developed by the new buildings institute. Importantly, we were, as this was developed, it was developed to even know we were using a dÃ©cor performance guide standards, we kept it in the same format as used in the IECC. This goes back to the idea that you want to keep this easily enforceable, simple. You want to keep the stretch code looking like the regular code so that itâ€™s not like reinventing the wheel and itâ€™s not having to force people to learn new systems as they go along.
We adopted, for the prescriptive path, we went with core performance guide, for two reasons, one, because new buildings institute had done an immense amount of work modeling it and found that it provided approximately 20 percent better savings than the widely used commercial code, which is Ashray 90.1 2007. And it was that the core performance guide was the standard of choice for energy efficiency programs for new constructions throughout the state of Massachusetts, woe here were already a lot of guilders building to it. Utilities were very familiar with it. They had a lot of information as to its cost effectiveness and so it seemed like a very good fit fore the stretch code.
And finally, I want to emphasize, this third bullet, is that compliance with, as part of the stretch code was achieved one of two ways, you either do it a prescriptive approach, which is basically using the cookbook requirements that were developed based on the core performance guide, or you could use the Ashray 90.1 performance method which is called the energy cost budget method to show that you were 20 percent, that you used 20 percent less energy than building a home two the Ashray 90.1 2007 standard.
Those were effectively the two ways you can meet the requirements. We did do some things to limit the use of the prescriptive code for buildings between 5,000 and 100,000 square feet particularly. The reason we kind of set it 100,000 square feet is that in fact, modeling by the new buildings instituted indicated that after you get to buildings beyond 100,000 square feet, the prescriptive approach really didnâ€™t do a good job maximizing energy savings.
In other words, if you have a fairly small office building, 50,000 square foot office building or the like, you really cannot justify the cost of doing a full performance program and doing all the modeling and the software required to figure out whatâ€™s needed in terms of energy provisions. You nee the energy requirements of the buildings. So, a prescriptive cookbook approach makes a lot of sense. Once you get to 100,000 square feet, the savings that a performance approach that using modeling and the like can generate really start overwhelming in many ways, the cost of the use of the modeling, of the computer programs and again, using the prescriptive approach at that point, you start to leave, you start leaving energy savings on the table.
So we made a limit to the prescriptive section to buildings between 5,000 and 100,000 square feet. Performance section applies to buildings greater than 100,000 square feet. I want to emphasize that for buildings less than 100,000 square feet you can also use a performance approach, itâ€™s just that you, for the performance approach is the only one available after, above 100,000 square feet. And another thing, we also made it apply to additions.
I want to go to some of the prescriptive requirements that go beyond at the Ashray 90.1. The envelope, the insulation requirements, the opaque envelope are more stringent. We have more stringent window requirements. Our window ceiling, or air leakage requirements that are in the stretch code are very tight. And we incorporated a lot more detailed commissioning requirements and I think that that was a very important decision on our part feeling that commissioning is a particularly for commercial buildings, is really a way to ensure that the energy savings, as much as possible are met. That the promise of the energy efficiency of the building are met.
So, we really incorporated more detailed commissioning requirements which I will touch on later, but beyond just things that go beyond that you will find in the Ashray 90.1 standard, but we made more stringent, we also have a number of requirements not found. For example, we wanted to have heating and cooling equipment that is more stringent than the federal requirements. So we were, we did what we call and HVAC trade off, which again, I will touch on in a little bit. We added the possibility of using renewable energy.
We added language requiring an air barrier. We added additional lighting controls. One thing that did not get in, but I feel very strongly about and that I want to discuss a little bit is the use of design intent as part of the building process and incorporating it into code. So let me go through some of these requirements in a little bit more depth. The design intent section is designed to require those involved in the project to think through the design process. Itâ€™s particular, as I like to think, itâ€™s particularly useful to our complex buildings. In other words, get everybody in the room, the engineers, the architects, as much as possible the contractors and the developers and really think through how you are going to incorporated energy efficient design into the building.
And so we have a design intent worksheet, in a sense, that requires the project architect, of whoever is in charge of the construction, what do we want to meet? What are the performance objectives that we want to meet. We want to talk about building orientation and how it affects the energy used. We want to make sure that load sizing is done. And we want to have a narrative and a discussion of the element deign that takes the building beyond the minimum efficiency requirements. Have they thought through all those issues? And that should be included as part of the construction submittals, as far as the construction drawings. I think this helps at the beginning of the process to make sure that you are able to really think of the construction process as a whole.
I might add that this is for the commercial ___ part of the building not the residential, because I think this makes more sense as you get increasing complexity in buildings. But having, forcing people to write down a narrative and itâ€™s not complicated, itâ€™s like a paragraph, not a ten page term paper or anything. Really helps make sure that as you, s the building gets designed and constructed weâ€™ve taken energy efficiency into the consideration from the beginning. We have required the use of air barriers. We made requirements that they be continuous. Limit the air permeability, talk about how it must be maintable. And talk about how it should be flexible.
In other words, it should be, any air barrier design should be designed to move with the building do that it doesnâ€™t rip or tear. This was not part of Ashray, and I think this is a big improvement because in a sense this helps tighten the building envelope, and as we all know, air rushing in and out of a building is a big source of energy loss.
Commissioning, we included commissioning requirements, development of commissioning plans. Tests, and reports, but we also put in a requirement that for within 90 days, there would be a final equipment balancing report, make sure that manuals are incorporated. Incorporate ___ drawings so that there is both commissioning during the commission process and at least a little bit of time after the certificate of occupancy, again, to make sure that things are built the way that they are designed, so we really tried to beef up the commissioning process.
Now, let me talk a little bit about the trade off. As many people-, as it may or may not widely be known is the federal government sets standards on commercial heating and cooling equipment. A code cannot have-, cannot specify energy efficiency, greater than the federal requirements unless there are tradeoffs. Unless you give the designers and the builder options. So, we decided to go and give three options on generating more efficient HVAC equipment. Number one you can just incorporate, more efficient mechanical equipment. However, if you just want meet the federal requirements and not go with a more essential mechanical equipment specified in the code, you have to reduce your lighting and power density by 20 percent.
Or, if you donâ€™t want to reduce your lighting power density by 20 percent, you can maintain federally mandated efficiencies on HVAC equipment and include an onsite supply of renewable energy. So you can either have more efficient equipment or if you have just more efficient equipment than the federal requirements, or if you meet the federal requirements you either reduce lighting power density 20 percent of your incorporate onsite renewable energy. This was a one of those innovative ideas that we really tried to incorporate to both give builders flexibility on this issue, but also to make sure that we took into account federal laws that can hamper the development of energy codes of stretch codes.
Let me talk a little bit about the current situation in Massachusetts, as of May, I believe 43 municipalities have adopted the stretch code and this includes some very significant towns such as Cambridge, Newton, North Hampton, Lowell, and some other smaller towns as well. Iâ€™d estimate that Iâ€™d say probably a good 10 to 15 percent of the population of Massachusetts is now under the stretch code. And as such, it will have really risen the level of energy efficient construction in the state.
So, I also want to-, and so one of the great things that this has done is this had provided a guide the future, so at the final action hearings for the international code council in Charlotte, where they are going to be working on the 2012 international energy conservation code, there is a very important code proposal that is based on the requirements found in the Massachusetts stretch code. And so this is something that the Massachusetts board of building regulations and standards was really keen on. Massachusetts developed this code and adopted this code, and as a result, it now will, we see that it works, that it can built to, that it generates energy savings and now that itâ€™s going to be part of the next national model code. And when the next national model code comes in, with any luck, we will have new stretch codes that go beyond the 2012
And many who-, and I want to say that many requirements in the residential code such as very strict building infiltration and duct ceiling requirements are also part of energy proposals for residential buildings for the 2012 IECC. So, let me get into some of the alternative stretch codes. I wonâ€™t talk on these as much. These are both Ashray 189.1 and the California green standards code, as I mentioned are green codes so that the cover a number of issues beyond energy efficiency, but do function, do have a stretch code function in that energy efficient sections of these codes are more efficient than the model codes or in the case of California, California title 24.
So the Ashray standard 189.1 is roughly 27 percent more efficient than Ashray 90.1 2007, on average. In other words, from, this was a calculation done by the national renewable energy laboratory. And it measured nationwide. Some places will have it will be even more, in some part of the country it will be even more than 27 percent more efficient in some parts of the country will be somewhat less, but in a sense if you were to adopt this code nationwide, you would get a nationwide improvement of 27 percent. The California green standards code, CalGreen has two tiers, the first one requires 15 percent more energy efficiency than the California energy code or title 24. If you want to go to tier two, itâ€™s a 30 percent more energy efficient code.
Some of the attributes that are incorporated in the California Green code, which is the residential code, it incorporates commission and requirements for the first time in a residential code. Renewable energy, and more efficient appliances, the commercial codes incorporate even more innovative ideas such as the use of energy use monitoring so that we know they are actually meeting the energy targets that we have modeled them for. In other words, a code, itâ€™s supposed to generate a certain level of energy use and energy savings, but once the house gets built we donâ€™t know that, and so, in these two codes you are supposed to monitor your energy use to see if thatâ€™s actually happening. The requirement is to help with demand sit monitoring management, basically help alleviate peak load conditions. And as before, renewable energy requirements and commissioning.
Let me give you these links to the stretch codes, the three that I have here. And thatâ€™s my presentation. And my name is Isaac Elnecave. Iâ€™m senior policy manager with the Midwest Energy Efficiency Alliance and I will now give about ten minutes for questions. I will go through the questions on this and go through them. If there are any questions I would appreciate it. Anything that you would like to mention.
The first question is are there any, hold on let me, are there any other examples of residential stretch codes besides Massachusetts? The only one, right now, as I mentioned is the California Green Standards code which includes both a residential requirement and a commercial requirement so yes, that is, so the California Green Standards code does have a residential stretch code.
The next question is do you have any experience or suggestions about code education and enforcement, code officials are an obvious target, but what about the energy coach requirements that engineers that are making the drawings and their education on the requirements. So basically, my feeling on that is that code education, particularly on stretch codes, has to go well beyond code officials would be my suggestion. I think itâ€™s very important that all members of the building community whether they be architects engineers, code officials, developers, I would include, for example, the trades, carpenters, utilities, utility representatives who are now going to see demand site management of some of these codes need to be incorporated in training programs for this.
And I would very much emphasize that I think itâ€™s important to have all, as much as possible to have all these people in the same room, not to silo the training and so I would, in fact, do code education to the broader community, not just to code officials. Let me go to the next, I, I, I apologize the next question, can you repeat what the difference between a reach and a stretch code?
There is no difference. I just should have called it a stretch code for the whole time. Itâ€™s just different terminologies, but itâ€™s the same thing. Why hasnâ€™t Boston adopted the Mass Stretch Code? Oh boy, thatâ€™s a very difficult question. Because Boson, in fact, does pride itself on being a community that incorporates green design. I believe that there is, I donâ€™t actually have a very good answer for why Boston has not. I believe they are concerned about construction in the city, but that shouldnâ€™t be since other municipalities, including a town like Cambridge includes some very complex commercial construction has adopted this.
I, unfortunately, do not have a good answer as to why Boston has not adopted the Mass Stretch Code, they should, but they havenâ€™t. And I do not have a good answer for that. To your knowledge is their mandates, to your knowledge is there manages from DOE to establish codes in all states? Yes, there is. If you mean stretch codes, no. If you mean regular codes, yes. There is-, are statutory requirements that all states have to adopt the basic international energy conservation code for residential and Ashray 90.1 for commercial, however, there is no mandates from DOE to adopt a stretch code.
DOE really does just focus on the national model codes. And does not focus on stretch codes. Question, I thought that the Illinois new energy code does not permit residential requirements more stringent than the state code. What do we do in regard in this when developing residential energy provisions? Let me clarify something on Illinois. Illinois does have what I mentioned as a minimum, maximum prevision, but that applies to most of the state. Prior to 2010, Illinois did not have a residential code, a state wide code.
But it did have a number of local jurisdictions that did have a regular code. Cities such as Chicago, for example, and Oak Park and the like. The new legislation, the new statue that established the state wide code allows jurisdictions that had a code prior to effectively the middle of last year to adopt a code that is more stringent than the state wide code, so many places that did not have codes before the state wide codes came into effect, cannot do this, but cities like Chicago, Evanston, Oak Park and many others, Schaumburg can do so. But if you are a local jurisdiction that did not have a code before the state wide code came into effect, you have the state wide code and you cannot change it.
Itâ€™s only those municipalities that had a code prior to the implementation of the new state wide code. So in those cases you can build, you can set a code thatâ€™s more stringent than the statewide code. Can we get the PowerPoint presentation to obtain the code web links? Yes, I will be sending my presentation to DOE and I believe they will be posting it. And if not, feel free to send me an email and I will send you my presentation.
I believe you can do this, where can I down load a copy of this presentation? I believe, again, you can do this off the Department of Energy website. But again, if you can see my contact information, you can certainly send me an email and I will be happy to send you my presentation. At what point will stretch codes be incorporated in national codes especially for low hanging improvements. As I mentioned, in fact, stretch codes that are in place right now for the Massachusetts stretch codes, many of those improvements will be incorporated, I believe, into the 2012 international energy conservation code.
The amendment-, there are several amendments that will be voted on at the final action hearings in Charlotte at the end of next month and many of the requirements in the Mass Stretch code will be incorporated into the 2012 IEEC, or will be voted on and I believe it has a very good chance of being incorporated, again, many of these issues such as the tighter insulation requirements, better windows, commissioning HVAC trade off and the like, I believe, will be part of the new code. If anybody wants to dig deep into it, if you can find, when you look into the amendments to the-, that are being considered to the 2012 energy code, energy code amendment 147, EC 147, has many of those, has many of those in there.
Where can we find a copy of this slide show? Again, I believe the Department of Energy should be posting this on their website and again, please send me an email and I will be happy to send you my presentation. Important to note, that Ashray 90.1 and 189.1 are standards that maybe the basis for codes, but are not codes themselves. Yes, they are. I want to clarify something, they are standards, but they are actually written in code enforceable language and are, in fact, enforced as codes in a large number of states. Ashray 189.1 not so much, obviously, but Ashray 90.1 yes, so they are standards, they are not specifically, as you would say, a code, but again, they are written in code enforceable language and are enforced as codes.
How can I get a copy of energy efficient residential construction details, for example a section drawing of a high energy efficiency wall system? The building American website would be, is a fantastic place to get information on how to build high efficiency wall systems. Building American really is the cutting edge on residential energy efficient construction and they do a lot of work.
And they do a lot of work on design and testing on high efficiency wall systems, so if you go the building America website which is part of the Department of Energy, actually there are papers that will have numerous examples of energy efficient wall systems and I understand that thatâ€™s obviously an important issue because you, when you are doing this sort of thing, high energy efficient wall systems you have a lot of detail that have to be dealt with, including moisture control as well as, energy efficiency, so I would go to the building America website.
Youâ€™re welcome. The next question is thanks. And again, youâ€™re welcome. Can I report the number of attendees in the webinar? At the moment there are 27. I believe it got up to about 45. All right, I have two more questions and I think I will have to end at that point since Iâ€™m already five minutes over. Um, is, next question is, is designing a green building program, is it appropriate to build in both and offer incentives for both a stretch code for Cal Green Tier one and for higher green rating programs at LEAD? As LEAD?
As youâ€™re doing a green building program, thatâ€™s different than in many ways, a stretch code, because, again, a stretch code is in fact a mandate. Itâ€™s law in the jurisdiction that adopts it. It certainly makes sense as Massachusetts did, to-, if need be, to set incentives for adopting a stretch code, but remember that in doing that, youâ€™re having jurisdictions adopt a code. A green building program, I think I would shy a little bit from, I would shy a little bit away from setting incentives for LEAD, but thatâ€™s a question-, there will be, actually, I guess thatâ€™s a really good one in that, I can get back, but I believe on the 24th there will be a webinar on green codes and energy efficiency programs where I think that question could be more appropriately addressed. Iâ€™m sorry, I donâ€™t have a very good answer for that one.
And finally, have you done any analysis on modeled energy use versus constructive energy use? That would be-, no that is the big open question. Let me repeat that question because thatâ€™s a very huge, have you done any analysis on modeled energy use versus constructed energy use. That would be interesting information to see at some point. That is a huge, huge open question in the sense that we have three ways of looking at energy use with respect to codes, one you have a prescriptive path which you do a cookbook and that kind of assumes, and thereâ€™s an assumption of what the energy savings would be for that and what the energy use would be for that.
You can go a step further and model it using software, but that in itself incorporates error because even as everybody knows as you, the design of the building, issues such as maintenance and occupant use has a big effect on energy use. And so the third point being, energy use monitoring. One of the, thatâ€™s why I emphasized, we donâ€™t have it, but-, and it was something that was considered as part of the Mass Stretch Code, we just didnâ€™t feel that we had enough time to really do it right. But California Green Standards code does incorporate energy in both Ash-, excuse me, I think Ashray 189 and the California Green Standards Code does incorporate requirements, but there is no real data, there had been no real studies on how to compare energy use with model energy use.
The only study that I am aware of is the one that was done by the new buildings institute that did energy actual energy use of buildings that had met LEAD requirements, so these were LEAD buildings that were being compared. Itâ€™s all, the study is already a couple years old and the green building counsel has made changes to their program and what they found is that there is a wide variability between predicted energy use and actual energy use, but that is really the next step and where many of the stretch codes and the green codes are heading. Thatâ€™s the final question.
I would like to thank everybody for attending and before, I have my final slide here, please contact me with any additional questions on this issue, and I thank you. Good bye.