4 Common Energy Efficiency Ratings are SEER, EER, HSPF and AFUE. Here’s what they mean.
SEER, EER, HSPF & AFUE ratings
1. Seasonal Energy Efficiency Ratio – SEER Rating
SEER = Seasonal Energy Efficiency Ratio
SEER is used for = Compare the efficiency of different central air conditioning units.
The basic formula is ? (Annual cooling output in the cooling season) ÷ (total energy input in the cooling season)
2. Energy Efficient Ratio – EER Rating
EER= Energy Efficient Ratio
EER rating is used for = Comparing efficiency of room air conditioners.
The basic formula is ? (Total cooling output at a time) ÷ (total energy input at that time period)
3. Heat Seasonal Performance Factor – HSPF Rating
HSPF = Heat Seasonal Performance Factor
HSPF is used for = Comparing efficiency of heat pumps
The basic formula is ? (Total heat output in heating mode) ÷ (total energy input at that time period)
4. Annual Fuel Utilization Efficiency – AFUE Rating
AFUE = Annual Fuel Utilization Efficiency
AFUE is used for = Comparing efficiency of different furnaces, boilers and heaters.
The basic formula is ? (Total heat output) ÷ (total fuel energy)
Read the whole article here – Understanding Energy Efficiency Ratings Of Heating and Air Conditioning or Cooling Systems – SEER, EER, HSPF & AFUE