BTU calculator: what size air conditioner do you need?
Enter your room details to estimate the cooling capacity (BTU) you need. Buying the right size keeps both comfort and running cost in check — an oversized unit just wastes energy.
Recommended cooling capacity
11,500 BTU
for a 25 m² room with these conditions
See 9,000–12,000 BTU air conditioners by running cost →Estimate only (~450 BTU per m²). Very sunny rooms, high ceilings, kitchens and extra people increase the requirement.
Next: work out a unit's bill with the running cost calculator, read the BTU sizing guide or the running-cost guide.
