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Bigger Isn’t Always Better

20 June 2012

Upgrade your window A/CThis time of the year, window air conditioners can be a blessing – but the cost of running them can be a curse.  Luckily, you can avoid overspending simply by having the right size A/C for the room. The main idea to keep in mind is that a larger A/C unit doesn’t necessarily cool your room any better.

The crux of the A/C size issue is the time it takes your A/C to remove moisture from the air.  An oversized A/C tends to run for shorter periods of time, lowering its ability to reduce humidity – resulting in very cold, very damp air.  It may seem counter-intuitive, but smaller A/Cs that run a little bit longer at first are much better at reducing humidity and keeping rooms at a comfortable temperature.  Since the larger units are so bad at removing humidity, you’ll end up using more energy running it more often to try and reduce the moisture.

For the smartest window A/C use, find one that is properly sized for the room you want to cool and use the energy-saving settings that will set it to automatically cycle.  And enjoy!

Take a look at this chart to find the right capacity A/C for your space. Energy Star

Area To Be Cooled (square feet) Capacity Needed (BTUs per hour)
100 up to 150 5,000
150 up to 250 6,000
250 up to 300 7,000
300 up to 350 8,000
350 up to 400 9,000
400 up to 450 10,000
450 up to 550 12,000
550 up to 700 14,000
700 up to 1,000 18,000
1,000 up to 1,200 21,000
1,200 up to 1,400 23,000
1,400 up to 1,500 24,000
1,500 up to 2,000 30,000
2,000 up to 2,500 34,000
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