AC size guide
20x25 Room AC Size
A 20x25 ft (500 sq ft) room needs a VRF or ducted system AC.
Size for your type of room
| Room type | Cooling load | AC size |
|---|---|---|
| Shaded room, lower or middle floor | 60,424 BTU/h | VRF or ducted system |
| Normal sun, middle floor | 66,424 BTU/h | VRF or ducted system |
| West-facing or top floor | 79,324 BTU/h | VRF or ducted system |
One split AC is not enough here
For this size, use two or more split ACs, cassette ACs, or a VRF system. Cooling comes out more even and you can switch off part of the room.
Check your exact room
The calculator is filled with this room size. Add ceiling height, sun, floor and people for your exact answer.
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Live estimate
500 sq ft · approx VRF System (Primary Recommendation)
Calculate for cost & models
Fine-tune: sunlight, floor, ceiling height, occupancy▾
What changes the size
- Afternoon sun on a west wall can add 10 to 15%.
- A top floor under a concrete roof adds about 10%.
- Each extra person adds about 600 BTU/h.
- A ceiling above 10 ft adds about 10% per foot.
- A kitchen or many electronics add 1,000 to 3,400 BTU/h.
Commercial projects team (VRF, offices, shops)
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Common questions
›How many ton AC for a 20x25 room?
A 20x25 ft (500 sq ft) room needs a VRF or ducted system AC.
›20 by 25 room me kitne ton ka AC lagega?
20 by 25 (500 sq ft) ke room me VRF or ducted system ka AC sahi rahega.
›Is a bigger AC better?
No. An oversized AC switches on and off often, removes less humidity and wastes power. Buy the right size.