Upto 300 sq ft - 9000 Btu's

300-500 sq ft - 12000 Btu's

500-600 Sq Ft - 15000 Btu's

500-750 sq ft - 18000 Btu's

750-1000 sq ft - 24000 Btu's

1000-1300 sq ft - 30000 Btu's

1300-1500 sq ft - 36,000 Btu's

1500-1750 sq ft - 42,000 Btu's

1750-2000 sq ft - 48,000 Btu's