Older Home (Drafty) · 600–900 ft²
Cold Climate
BTU & Cost Estimate
BTU Required
39,848
BTU/hr
AC Tonnage
3.5
1 ton = 12,000 BTU/hr
Installation Cost
$12,250 - $21,000
USD
How we calculate
Base area (900 ft²) × BTU per sq ft (35)31,500 BTU
× Load Factor (1.15)36,225 BTU
+ Safety Margin (10%)39,848 BTU
Final BTU Estimate39,848 BTU → 3.5 Ton