Electric Furnace Size Calculator

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.

Furnace Efficiency Calculator

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.

Furnace Operating Cost Calculator

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.

Furnace BTU Calculator

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

AC BTU Calculator

Estimate the recommended air conditioner cooling capacity in BTUs per hour based on room size, ceiling height, sun exposure, insulation quality, and occupancy.

AC Tonnage Calculator

Estimate the recommended air conditioner tonnage based on room area, ceiling height, climate, sun exposure, and insulation quality. This helps size a residential cooling system for typical home spaces.

Central Air Conditioner Size Calculator

Estimate the recommended central air conditioner size in tons based on conditioned floor area, ceiling height, climate zone, insulation quality, and sun exposure. This provides a planning estimate for cooling capacity before a professional Manual J load calculation.