Heating & Heat Pump Calculators
Electrification sizing, cold-climate heat pump balance points, gas combustion air calculations (NFPA 54), and hydronic boiler sizing.
Heat Pump Sizing & Balance Point Tool
Calculate heat pump thermal balance point, cold-climate low-ambient heating capacity (47°F, 17°F, -5°F), and auxiliary electric backup heat strip sizing.
Furnace Sizing & AFUE Efficiency Calculator
Calculate required furnace input and output BTU based on home square footage, climate zone, and AFUE efficiency (80% vs 96% condensing).
Hydronic Boiler & Baseboard Sizing Calculator
Size residential hydronic heating boilers based on fin-tube baseboard linear footage, cast-iron radiator EDR, and indirect domestic hot water priority.
Garage & Workshop Heater Sizing Calculator
Size gas unit heaters, forced-air electric heaters, and radiant tubes for attached and detached garages accounting for slab losses and door infiltration.
Combustion Air & Confined Space Sizer (NFPA 54 / IFGC)
Calculate mechanical room confined space volume (50 cu ft/1,000 BTU) and size permanent combustion air openings for gas furnaces and water heaters.
Hydronic & Forced-Air Thermal Generation Flow
Fuel combustion and reverse-cycle heat pumping to offset building thermal envelope transmission losses.