Older Home (Drafty) · 900–1,200 ft²
Warm Climate
BTU & Cost Estimate
BTU Required
42,504
BTU/hr
AC Tonnage
3.75
1 ton = 12,000 BTU/hr
Installation Cost
$13,125 - $22,500
USD
How we calculate
Base area (1,200 ft²) × BTU per sq ft (28)33,600 BTU
× Load Factor (1.15)38,640 BTU
+ Safety Margin (10%)42,504 BTU
Final BTU Estimate42,504 BTU → 3.75 Ton