81% BTU Calculator

81% Efficiency
Heatco Offers Numerous 81% 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 ACFM (Actual)**

  • Btuh Out

  • Inlet Air Temp (°F)

  • Elevation

  • Air Density (lb./ft3)

  • Bar. Press. (“Hg)

  • Comb Eff

**For SCFM, use 70° inlet air temp regardless of your actual entering air temperature.

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.

Our mission 

Our mission is to design, build, and deploy America’s highest-quality gas heaters while providing industry-leading customer satisfaction. You can expect Heatco to deliver innovative, energy-efficient equipment using the most up-to-date components and manufacturing techniques.

–  HEATCO ETHICS IN BUSINESS POLICY

–  HEATCO CONSERVATION GOALS

Contact us

Address: 50 Heatco Ct. Cartersville, GA 30120

Phone: (770)529-2000
Fax: (770)529-2005
Toll Free: 1-800-554-1007

Email:  Sales@heatco.com