HVAC & Water Heater Energy Efficiency Calculator
How is the CO2 reduction estimated?
It multiplies the annual kWh saved by 0.92 lb/kWh, the US national grid-average carbon factor (EIA/EPA, roughly 2024). This is a rough national figure: coal-heavy grids such as WV, KY, and WY exceed 1.5 lb/kWh, while renewables-heavy grids like VT, ID, and WA run under 0.5, per EPA eGRID.
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Use the HVAC & Water Heater Energy Efficiency Calculator to get an exact answer for your inputs.
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