Calculating the size of air conditioning you need for your home is an essential step in making sure that your living space is comfortable and energy-efficient. To determine the size of air conditioning system you require, you must first calculate the square footage of your home and multiply it by 20 to get the necessary BTUs. Every 12,000 BTUs is equivalent to one ton. If your home isn't well insulated or has old-style windows, you may need to select a larger system than what is recommended for the square footage of your home.
To determine the size of your current air conditioning system, use the model number, not the serial number. You'll also need to calculate the square footage of the room where the window air conditioner will be located to determine what size you need. As a general rule, if your house is well-insulated and has new-style windows, you can usually choose the smallest size system that meets the necessary specifications for the total square footage. This will help ensure that your home is comfortable and energy-efficient.