Window air conditioners are not generally the most efficient option for cooling a house, but they have their uses, particularly for cooling individual rooms. If you need to cool a room that your air conditioning ductwork doesn’t reach, a window air conditioner is not a bad choice.
Also, some homeowners, deterred by the cost of replacing a central air conditioner when it conks out, may try to get by with one or more window A/Cs.
Here’s some shopping advice for window A/Cs:
You can tell how efficient the room A/C is by the EER, the energy efficiency ratio, which is provided on a label. A/Cs with the Energy Star label are rated for efficiency.
Just as a central A/C must be sized for cooling capacity according to the square footage of the house, the capacity of the room A/C you choose should also depend on the size of the room. Remember that bigger is not always better. A room A/C that’s too large will actually be less efficient.
Generally, you will need a capacity of 20 BTUs (British thermal units) per each square foot of space. Room height, shading, window size, and number of windows will also figure in.
Make sure that the A/C you choose can direct airflow in the direction you want it to flow. Also, a control called “Super Thrust” or “Power Thrust” means the unit can send cooled air deep into the room.
The A/C should be level when you install it so the drainage system and other parts work efficiently.
Smaller units — those that draw less than 7.5 amps — may be plugged into a 115-volt circuit as long as no other major appliances are plugged in. Larger room A/Cs need a dedicated 115-volt circuit, while the largest models will need a 230-volt circuit. If you don’t have the right circuit, you will have to hire an electrician to install one that works for the A/C you want.
To discuss installing a window A/C, contact Powers Heating and Air of Peachtree City.