BTU Calculator

80% Efficiency
Heatco Offers Numerous 80% Efficient Gas Heat Options - HM, HD, HE, HF, HH, HT Product Lines
90% Efficiency
Heatco's EF Series 90% Efficient Indirect Gas Furnaces Offer Industry Leading Heating Efficiency
93% Efficiency
Heatco's EC + EM Series 93% Efficient Indirect Gas Furnaces Offer Industry Leading Heating Efficiency
  • Btuh Input
  • Temp Rise
  • Airflow CFM
  • Btuh Out
  • Inlet Air Temp (°F)
  • Elevation
  • Air Density (lb./ft3)
  • Bar. Press. ("Hg)
  • Comb Eff
IMPORTANT: All burners / heat exchangers must be sized at 0ft. elevation for given design conditions. Adjustments for operation at altitude will be made by the factory. Please contact Heatco with any questions.