1150 sq ft room
The ENERGY STAR chart puts a 1150 sq ft room at 21,000 BTU/hr.
| Situation | BTU/hr |
|---|---|
| Normal | 21,000 |
| Heavily shaded (−10%) | 18,900 |
| Very sunny (+10%) | 23,100 |
| 4 regular occupants (+1,200) | 22,200 |
| Kitchen (+4,000) | 25,000 |
Worked example
A sunny 1150 sq ft living room used by 3 people: 21,000 × 1.1 = 23,100, plus 600 for the third person = 23,700 BTU/hr. Round up to the nearest unit size sold.
Frequently asked questions
How many BTU for 1150 sq ft?
21,000 BTU/hr (ENERGY STAR chart), adjusted for sun and occupancy.