U.S. Department of Energy - Energy Efficiency and Renewable Energy

Energy Calculators and Software

Space Heating and Cooling

Here you'll find calculators for evaluating space heating and cooling systems for the home.

Cost Estimators

• Heating and Cooling Cost Comparison Calculators

  Compare the yearly operating costs of heating and cooling systems. From the Western Area Power Administration

• Fuel Cost Comparisons

  Compare the costs of different fuels available for home heating. From warmair.net

• ENERGY STAR® Cost Calculators

  Find product information and savings calculators for a wide array of ENERGY STAR products.

• Compare Fuel Costs

  Compare the cost of pellet fuel to the cost of other heating fuels. From the Pellet Fuels Institute

Software

• Building Energy Software Tools Directory: HVAC Systems

  Features a list of software tools for heating, ventilating, and air conditioning (HVAC) systems, developed primarily for the buildings industry. From the U.S. Department of Energy

Related Information

To evaluate your choice of fuels and systems and to size them correctly, see the following sections:

• Selecting Fuel Type and System Type
• Sizing Systems

To evaluate your home's energy use, see the following sections:

• Meter Reading
• Home Energy Audits