Calculators

Estimate the recommended air source heat pump capacity based on floor area, insulation quality, climate severity, ceiling height, and occupancy.

Estimate seasonal heating output, seasonal electricity use, or effective HSPF for a heat pump using heating capacity, annual heating hours, part-load factor, and electricity use. HSPF is the total seasonal heating output in BTU divided by total seasonal electricity use in watt-hours.

Estimate the coefficient of performance (COP) of a heat pump using heating output, electrical power input, outdoor air temperature, and supply water temperature. COP is adjusted from the measured output-to-input ratio using temperature lift effects for a more realistic operating estimate.

Estimate heat pump efficiency as COP (Coefficient of Performance) based on heating output, electrical input, outdoor temperature, and system type adjustment.

Estimate annual electricity use in kWh for a heat pump based on home heating demand, heat pump efficiency, climate, and supplemental heating share.

Estimate monthly electricity consumption for a heat pump based on heating demand, runtime, system capacity, efficiency, and climate conditions.

Estimate the monthly operating cost of a heat pump based on heating demand, seasonal efficiency, electricity rate, runtime, and climate adjustment.

Estimate the electricity cost to run a heat pump based on heating demand, system efficiency, operating hours, electricity rate, and seasonal usage.

Estimate the required ground source heat pump capacity in kW from building heat demand, climate severity, insulation quality, and system efficiency assumptions.

Estimate the recommended heat pump capacity in BTUs per hour based on home square footage, ceiling height, climate zone, insulation quality, and sun exposure. This calculator provides a sizing range to help evaluate heat pump needs for residential spaces.

Estimate the natural gas used by a furnace based on input capacity, daily runtime, heating days, furnace efficiency, and gas energy content. Useful for approximating seasonal gas consumption.

Estimate the recommended heat pump size in tons based on conditioned floor area, climate zone, insulation quality, ceiling height, and sun exposure. This calculator provides an approximate HVAC tonnage for residential planning.

Estimate the recommended heat pump capacity in BTUs per hour based on home size, climate, insulation quality, ceiling height, and sun exposure.

Estimate the recommended heat pump size in BTU/hr based on home size, climate severity, insulation quality, ceiling height, and occupancy.

Estimate the recommended heat pump capacity based on home size, climate, insulation quality, ceiling height, and occupancy adjustments.

Compare the estimated annual heating cost and yearly savings of an 80% AFUE furnace versus a 96% AFUE furnace based on home heating demand, fuel price, climate, and system runtime factor.

Estimate annual heating cost savings from replacing an older furnace with a higher-efficiency model based on home heating demand, current and new AFUE ratings, fuel price, and climate.

Estimate the installed cost to replace a residential furnace based on home size, furnace efficiency, fuel type, installation complexity, and regional labor/pricing differences.

Estimate the electricity used by a furnace blower and controls based on blower wattage, daily runtime, heating season length, and electricity rate. This calculator returns the estimated operating cost for the heating season.

Estimate the recommended gas furnace output size in BTU/hr based on home square footage, ceiling height, insulation quality, and climate zone.

Estimate the recommended furnace heating capacity in BTU/hour based on home size, climate, insulation quality, and ceiling height.

Estimate the recommended furnace heating capacity in BTUs per hour based on home size, ceiling height, climate zone, insulation quality, and home airtightness.

Estimate recommended furnace heating capacity in BTU/hour based on home size, ceiling height, climate zone, insulation quality, and furnace efficiency.

Estimate the recommended gas furnace output in BTU per hour based on home size, climate, insulation quality, and ceiling height.

Estimate the recommended electric furnace heating capacity based on home size, climate, insulation quality, and ceiling height. This calculator provides an approximate furnace size in BTU per hour for residential heating needs.

Estimate the recommended furnace heating capacity in BTUs based on home square footage, ceiling height, climate zone, insulation quality, and home age.

Estimate furnace thermal efficiency based on useful heat output compared with fuel energy input, with an adjustment for steady-state operating conditions and annual degradation from system losses.

Estimate annual furnace fuel cost based on home heating demand, furnace efficiency, fuel type, fuel price, and local climate severity.

Estimate the hourly operating cost of a furnace based on heating output, efficiency, fuel type, fuel price, and runtime. This calculator converts furnace output to fuel energy input, applies efficiency losses, and estimates total operating cost for the selected hours of use.

Estimate how much it costs to run an air conditioner based on its power usage, daily runtime, local electricity rate, number of days used, and cooling efficiency.