HVAC sizing is measured in tons, where one ton equals 12,000 BTUs of cooling capacity. While you can estimate using square footage (roughly 600 square feet per ton for residential homes), the most accurate method is a professional Manual J load calculation that considers your home's insulation, orientation, windows, climate, and occupancy patterns.
Tonnage => BTU/Hour
1 ton => 12,000 BTU
1.5 ton => 18,000 BTU
2 ton => 24,000 BTU
2.5 ton => 30,000 BTU
3 ton => 36,000 BTU
3.5 ton => 42,000 BTU
4 ton => 48,000 BTU
5 ton => 60,000 BTU
Home Size (Sq. Ft.) => Recommended Tonnage
750–1,000 => 2 tons
1,050–1,400 => 2.5 tons
1,450–1,700 => 3 tons
1,750–1,900 => 3.5 tons
1,950–2,200 => 4 tons
2,250+ => 5 tons
Important: Undersizing leads to inadequate cooling; oversizing wastes energy and money. When in doubt, consult a professional. Reach out to us at sales@acunitsforless.com or via Live Chat.