Older Home (Drafty) · 900–1,200 ft²
Cool Climate
BTU & Cost Estimate
BTU Required
45,540
BTU/hr
AC Tonnage
4
1 ton = 12,000 BTU/hr
Installation Cost
$14,000 - $24,000
USD
How we calculate
Base area (1,200 ft²) × BTU per sq ft (30)36,000 BTU
× Load Factor (1.15)41,400 BTU
+ Safety Margin (10%)45,540 BTU
Final BTU Estimate45,540 BTU → 4 Ton