Today’s air conditioners come in several different sizes, whether they are a central air conditioner, a stand alone air conditioner or a window air conditioner. To have your air conditioning in your home run at peak efficiency you should size it to the area you are trying to cool. In order to figure out the correct cooling area you will need to measure all areas you are trying to cool. This will give you a close estimate on what size air conditioner you will need to keep you cool.
In order to calculate this you will need to multiply the length times the width of the rooms you will be cooling. Once you have that number you can multiply that total time 25 BTU. This will give you excellent cooling whether it’s a sunny hot day, humid day or a moist day. Here is an example of figuring out what BTU is appropriate for your cooling demands. If the room you are trying to cool is 14 feet wide by 16 feet long that would mean you have 224 square feet. So we will take the 224 and times it by 25 BTU per square foot. So 224×25 = 5600 BTU’s. This is the minimum you would want to use to efficiently cool your room.
So what would happen if you were to use an air conditioner that is to small or to large. An air conditioning unit that is rated for less BTU’s will want to continually run so it can keep up trying to meet the cooling needs required. This will make your electric bill go up and will not effectively cool the room. A larger air conditioning unit can be overkill. In the air conditioning business bigger is not better. An air conditioner that is too large for the area will cool more quickly, but that is not always best when trying to properly cool a room. Here is why. When your air conditioner is on and cooling the room, it is also extracting moisture from the air. Moisture in the air is humidity which makes us feel hot and sticky. Even though the air will be cooler in a short amount of time, it does not give the air conditioning unit time to extract the moisture out of the air.
So to properly calculate the size of the air conditioner you will require, measure the area to be cooled and take this information to an air conditioning company or an appliance store where they can make the proper recommendations on what size air conditioner will best suit you.