Once you’ve decided to purchase a room air conditioner make sure you look for the Energy Star label. If every room air conditioner sold in the U.S. were Energy Star qualified, we could prevent 1.2 billion pounds of greenhouse gas emissions to put that into perspective that is equivalent to the emissions from 100,000 cars. Energy Star room air conditioners use at least 10% less energy than conventional models.In the room air conditioner game Energy Star isn’t the only certification to be looking for. You should also look for Association of Home Appliance Manufacturers or AHAM Certified units. Why? AHAM Certified room air conditioners have their EER ratings verified by an independent laboratory.
Room air conditioners like all air conditioning units are rated by the number of British Thermal Units (BTU) of heat they can remove per hour. Another common way of rating air conditioners is by the “ton,” some example are 5,500 BTU per hour or 14,000 BTU per hour.Getting the right size room air conditioner for your application is crucial. If you get the wrong size you can easily waste large volumes of electricity. The size of your air conditioner depends upon:
How large is your home and how many do you have? How much shade do you have? Do you have shade on your home’s windows, walls, and roof? Are the ceilings and walls of your home insulated properly? Do you have air leaks? How much heat do you, the occupants, and appliances generate? Remember the key to any air conditioners efficiency and performance depend on you properly matching the size of the AC unit to your specific application.