It might surprise you to know that buying a bigger room air-conditioning unit won’t necessarily make you feel more comfortable during the hot summer months, In fact, a room air conditioner that is too big for the area it is supposed to cool will perform less efficiently and less effectively than a smaller air conditioner.
It is better if air conditioners run for relatively long periods of time than if they are continually, switching off and on. Longer run times allow air conditioners to maintain a more constant room temperature.
Sizing is equally important for central air conditioning systems, which need to be sized by professionals. If you have a central air system in your home, set the fan to shut off at the same time as the cooling unit (compressor). In other words; don’t use the system’s central fan to provide circulation. You would be best advised to use circulating fans in individual rooms.
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