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Air Con Calculator

 To establish what size Air Conditioning Unit you will need, follow these simple instructions:


Air Conditioners as with heaters are measured in British Thermal Units (BTU's). A cool air calculator can be found on our sister site climate hire - click here to use the cool air calculator

To establish what BTU capacity will be required, simply multiply to dimensions of the room to be cooled.

e.g.: length x breadth x height

Then multiply this final figure by 5 - always measure and calculate in feet.

e.g.: 18 x 12 x 10 = 2160 Cubic Feet 21.60 x 5= 10,800 BTU's
The Air Conditioner you would require for a this is a Medium Air Conditioning Unit

This room size measurement is inclusive of up to 4 persons, a pc and a photocopier. For each additional person and electrical unit increase the total power requirement by 400 BTU's

e.g.: in a room with 8 persons, a pc and a photocopier.
10,800 + 4 x 400 = 12,400 BTU's
The Air Conditioner you would now require for this is a Large Air Conditioning Unit

Please remember that all air conditioners must be able to vent the accumulated hot air in to the external atmosphere, and consideration must be given to site them near to an open window of below a suspended ceiling. We can provide you with additional ducting at small extra charge.