Size Does Matter but There's More To Consider when Purchasing a Home Air Conditioner
In measuring a room's dimentions for purchaing the proper Air Conditioner size is important but, it doesn't mean everything. There are other factors that must be known for personal satisfaction, especially in bed at night. That's the way I feel
Most Air Conditioners sold in a store or on-line and right here on Shopping.com have charts with room sizes and square footage used as a guide for which size unit will fill the needs of the room. That happens to be a good starting point but, there's more to factor in when making the decision of what will fill your cooling needs.
It's a shame to have to pay for extra energy when purchasing the proper sized unit in the first place would make one more comfortable and save dollars in the long run.
Ceiling heights are sometimes taken into account on box top stats on A/C units, but not always. A ceiling higher than the average 8' has more air to be cooled in it therefor more BTUs may be needed.
Another factor can be the number of people in a room. Each person gives off heat so an additional 500 to 700 btu's per person over one could/should be factored in.
Any room that is close to a doorway that is opened often needs an A/C that can keep up with the change of air temperature and humidity that comes in and lets cooler air escape. Kitchens also need more BTUs because of heat from burners and ovens. Exhaust fans also pump out much air that must be replaced.
Energy efficient lighbulbs also help keep a room cooler than incandecent bulbs. Any room with many non-efficent bulbs may need a little bit more BTU power, especially if it also housed a PC that emits heat as do other appliances like refrigerators.
It's better to have an A/C that's just a bit too much for a room rather than one that cannot keep up with the heat and humidity leaving you in a hot uncomfortable situation.
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