Greenhouse Heating Load Calculator

Calculate heating requirements using ASAE EP406 heat loss methodology for precise heater sizing.

Greenhouse Type

Length (ft)

Width (ft)

Sidewall Height (ft)

Peak Height (ft)

Roof Covering

Wall Covering

Desired Inside Temp (°F)

Design Outside Temp (°F)

99% winter design temp

Wind Speed Factor

Energy Curtain?

Heating Load Results

Total Heating Load

Floor Area -

Roof Area -

Wall Area -

Volume -

Roof Conduction -

Wall Conduction -

Infiltration -

Perimeter Loss -

Heater Capacity (w/ 15% factor) -

BTU per sq ft -

LP Gas (gal/hr) -

Natural Gas (therms/hr) -

Note: Based on ASAE EP406 methodology. Add backup heating capacity for critical crop production.