HeatHelp tool
Estimate the cooling capacity your room needs
Get a straightforward starting point for choosing portable air-conditioning capacity.
Your result
9,000-12,000
BTU per hour
Approximately 2.6-3.5 kW of cooling capacity for this 15 square metre room, allowing for afternoon sun.
4.2m x 3.6mAfternoon sun
Heat-gain assumptions
| Capacity | Suitable for | Caveat |
|---|---|---|
| 9,000 BTU | Moderate heat gain | May struggle in direct sun |
| 12,000 BTU | Warm upper-floor room | Avoid unnecessary oversizing |
This sizing guide gives an illustrative range. Room shape, sun, insulation and occupancy can change the result.
Method and assumptions
About the sizing range
The sizing range considers room volume, solar gain, glazing, occupancy and equipment load. Results will remain product-neutral.
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