- Instant answersResults update as you type.
- Private by designRuns in your browser. Nothing is sent.
- Share, print or citeCopy a link with your numbers.
300 sq ft room
The ENERGY STAR chart puts a 300 sq ft room at 7,000 BTU/hr.
| Situation | BTU/hr |
|---|---|
| Normal | 7,000 |
| Heavily shaded (−10%) | 6,300 |
| Very sunny (+10%) | 7,700 |
| 4 regular occupants (+1,200) | 8,200 |
| Kitchen (+4,000) | 11,000 |
Worked example
A sunny 300 sq ft living room used by 3 people: 7,000 × 1.1 = 7,700, plus 600 for the third person = 8,300 BTU/hr. Round up to the nearest unit size sold.
Frequently asked questions
How many BTU for 300 sq ft?
7,000 BTU/hr (ENERGY STAR chart), adjusted for sun and occupancy.