The total watts all depends on how energy efficient the manufacturer made the appliance.
How many watts does a window air conditioning unit use.
A typical starting wattage for a window unit is 2200.
For a small bedroom a 5 000 btu window unit should only use 450 watts a mid size 8 000 btu ac should use fewer than 715 watts.
The department of energy energy star rating is given to window air conditioners that rate better than 11.
That s how you can easily estimate that 5 000 btu ac units use 500w of energy.
But rough estimates for how many watts an air conditioners uses are.
5 000 btu air conditioners are recommended for rooms less than 200 square feet ideally less than 150 square feet.
One 10 000 btu air conditioner may use 900 watts of electricity while another one uses 1 000 watts.
So how do you find out how many watts does a window ac use.
A rule of thumb to estimate how many watts of energy different air conditioners use is to take the btu number and divide it by 10.
Central air conditioner 3500 watts central a c fan only compressor off 750 watts largest window units 1440 watts.
That works out to the following figures for popular sizes.
Your unit may have different ratings.