Manual J Load Calculator
Square Footage Climate Zone Zone 1 (Hot) – 20 BTU/sqftZone 2 (Warm) – 22 BTU/sqftZone 3 (Moderate) – 25 BTU/sqftZone 4 (Cool) – 30 BTU/sqftZone 5 (Cold) – 35 BTU/sqftZone 6 (Very Cold) – 40 BTU/sqft Ceiling Height (feet) 8 feet9 feet10 feet12+ feet Insulation Quality PoorAverageGoodExcellent Number of Windows Number of Occupants Sun Exposure…