Efficiency & Savings

See the annual savings and simple payback of a SEER2, AFUE or HSPF2 upgrade — on your own upgrade cost and energy rate — plus documented EER↔SEER and COP↔HSPF conversions.

SEER2 Upgrade SavingsEstimate the yearly savings and simple payback of a higher-SEER2 AC upgrade from your own cooling load, electricity rate and equipment quote.AFUE Upgrade SavingsEstimate the yearly fuel savings and simple payback of a higher-AFUE furnace upgrade from your own heating load, fuel rate and current efficiency.HSPF2 Heat-Pump SavingsEstimate the yearly electricity savings and heating cost drop of a higher-HSPF2 heat-pump upgrade from your seasonal heating load and electricity rate.EER ↔ SEER2Convert an EER rating to an approximate SEER2 value using the documented SEER is about EER divided by 0.9 relationship, with the math shown in full.COP ↔ HSPF2Convert a heat-pump COP to an approximate HSPF2 rating using the documented HSPF is about COP times 3.412 relationship, with the math shown in full.

Every Efficiency & Savings tool is calculated server-side — visible immediately — with its formula, a worked example and a reference table. Background reading is in the guides.