What capacity do I need?

Selecting the right portable air conditioner

Selecting the right portable air conditioner is essential. A portable air conditioner that’s too big will be a poor investment, one that’s too small will struggle to cool your room.

BTUs/kWh

The capacity of an air conditioner to cool is measured in BTUs or kWh (kilo Watt hours). Bigger rooms need a  portable air conditioner with a greater BTU rating.

As a general rule, look at these room sizes:

18 metres square  4.24 x 4.24 metres (approx. 14 feet x 14 feet)

You’ll need an air conditioner with a rating of at least 7,000 BTUs to cool this room on a very warm summer day. 

24 metres square (approx. 16 feet x 16 feet) or approx. 4.9 metres x 4.9 metres 

You’ll need an air conditioner with a rating of 9,000 BTUs to cool this room on a very warm summer day. 

36 metres square (approx. 20 feet x 20 feet) or approximately 6 metres x 6 metres

You’ll need an air conditioner with a rating of 12,000 BTUs to cool this room on a very warm summer day. 

We've conveniently organised our air conditioners/coolers by size and application: 

Small/Medium Rooms

Medium/Large Rooms

Offices/Small Commercial

Outdoor Spaces

Don’t forget!

You’ll need to increase the capacity of the air conditioner you buy if:
  •  The room gets very hot, e.g. a conservatory
  •  Lots of people use the room at once e.g. a busy office
  •  You have multiple computer or heat generating equipment, e.g. a server room, offices
  •  You have very high ceilings

Also, any air conditioner will work most efficiently if it’s vented correctly - with no gaps around the hose.

Need help? Call us our friendly customer support team and we’ll help you select the best air conditioner for your room.