Furnace BTU Calculator

Calculate heating requirements for your home

Home Specifications

Heating Requirements

BTU Required

0

British Thermal Units per hour

Furnace Size:
BTU per Sq Ft:0.0

Note: This is an estimate. Consult an HVAC professional for precise sizing based on heat loss calculations, ductwork, and local codes.

Climate Zone Guide

Zone 1-2 (Hot)

South Florida, Hawaii - 30-40 BTU/sqft

Zone 3-4 (Moderate)

Southern US - 40-50 BTU/sqft

Zone 5-6 (Cold)

Northern US - 50-60 BTU/sqft

Zone 7 (Very Cold)

Northern Border - 60-70 BTU/sqft

Learn More

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