Tools
Calculators our engineers actually use.
Four quick tools for right-sizing equipment, estimating savings, and keeping filters on schedule. No signup, no email — just the math.
Heating
Furnace sizing estimator
Ballpark the BTU load for your home in 30 seconds. Adjusts for climate zone, insulation, and window count.
Open toolCooling
AC tonnage calculator
Right-size an air conditioner or heat pump. Shows why oversizing costs you humidity control.
Open toolPayback
Upgrade savings calculator
See annual savings, simple payback, and 10-year math for replacing an aging system.
Open toolMaintenance
Filter replacement planner
Personalized replacement interval, plus a downloadable calendar reminder that recurs on schedule.
Open toolReady when you are