How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
What does the HSPF of a heat pump system mean?
Friday, August 3, 2018
HSPF stands for Heating Season Performance Factor. It is the ratio of BTU heat output over a heating season to the watt-hours of electricity used, and is the standard measure of energy efficiency for heat pump in heating mode..
Just like the SEER rating used to evaluate cooling efficiency, a higher number means better efficiency, the minimum HSPF required by the U.S. Department of Energy starting on January 1, 2023, is 8.8 for any new heat pump system, and is 8.2 until then. Older systems have an HSPF of about 7.7, and the current high efficiency models are rated at 9 or higher.
The separate Annual Furnace Utilization Efficiency (AFUE) rating is used for gas and electric resistance heat furnaces. To read about that standard, see our blog post Is the energy efficiency of the furnace part of the SEER rating of a central air conditioning system?
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To learn more about heating and air conditioning systems, see these other blog posts:
• How can I find out the SEER of my air conditioner?
• My air conditioner won't turn on. What's wrong?
• How can I find out the size of my air conditioner?
• How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump?
• Where is the air filter for my central air conditioner and furnace? I can’t find it?
• Does an old air conditioner use more electricity as it ages?
• How did homes stay cool in Florida before air conditioning?
• What is wrong with an air conditioner when the air flow out of the vents is low?
• Why has the thermostat screen gone blank?
• Why does it take so long to cool a house when an air conditioner has been off for a while?
• Why is my air conditioner not cooling enough?
• What are the most common problems with wall/window air conditioners?
• Will closing doors reduce my heating and cooling costs?
Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.
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