If your room has more than two people on a consistent basis, consider increasing the window air conditioner size by 10% – 20%. The estimates above assume two occupants in the room. When cooling a kitchen, consider adding an additional 4,000 BTUs to the size of the air conditioner.īody heat can warm a room significantly. Consider the added heat of the oven or stove on a warm day. Appliances add a lot of extra heat to a kitchen, making them tougher to cool. Kitchens require much more energy to cool and require a larger air conditioner. To do this, take the size of the room in square feet, and add 10%, then find the recommended BTU range. Consider increasing the size of the air conditioner by 10% if the room gets a lot of sun. If the room gets a lot of sunlight, it will require additional energy to comfortably cool the room. Ideally, you want to be at the low to mid range of the unit’s capacity.įor example, to cool 1,100 sq ft, you would want a unit with 21,000 BTUs. To find the size of the room you are planning on cooling, measure the length and width of the room in feet and multiply those two numbers together. These air conditioner sizes assume a ceiling height of 8ft if your ceiling is higher than 8ft, consider increasing the size in BTUs by 10% to account for the added volume of the room. BTUs of cooling needed to condition various size rooms. The chart below from Energy Star shows how many BTUs are needed for a given room size.
A larger room will naturally require more energy to cool and more airflow in CFM than a smaller room.
The size of the room is the main factor in choosing a window air conditioner size. There are many factors to consider when sizing a window air conditioner. Factors to Consider When Sizing an Air Conditioner
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