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Whole House Air Conditioner - Sizing Up Your House Air Conditioner

When selecting the size for your whole house air conditioner, you will want to know a couple of units in which one measures the capacity of an air conditioner. The capacity or the whole house air conditioners refers to the speed by which heat is removed from your home. The bigger the size of the central air conditioner unit, the faster the heat can be removed from the house.

External Factors Influencing The Cooling Requirement

On the other hand, the speed of the heat removal also depends on the size of the home that we wish to cool, the outside temperature (which depends on the climate in your area), and the desired indoor temperature, as well as on the type of the insulation that our home features. The overall insulation depends on the materials in the walls, the size and type of windows and doors, on air-tightness of the home, how frequently the windows and doors are open.

So there is no single answer when it comes to what size of the residential air conditioning units to choose, but there are many factors listed in the previous paragraph that you can control, which will help you achieve pleasant temperature and air quality in your home, as long as your home AC unit is about the right size.

Standard Sizes (Cooling Power) Of Air Conditioning Systems

The size or heat removal capacity of any air conditioning system is usually expressed in BTU, or british thermal units, or in tons, where 1 ton = 12,000 BTU. There are only seven standard sizes for residential central air conditioning systems in the USA, 1.5 ton, 2 ton, 2.5 ton, 3 ton, 3.5 ton, 4 ton and 5 ton, which corresponds to 18,000 BTU, 24,000 BTU, 30,000 BTU, 36,000 BTU, 42,000 BTU, 48,000 BTU, and 60,000 BTU.

While the standard rule of thumb requiring 600 square feet of home square footage per ton of home air conditioners capacity is in effect for most of the USA, you may want to check with similarly built houses in your neighborhood, or if you are replacing an existing home air conditioner unit that worked for you satisfactorily, then you may just want to keep the BTU capacity of the existing air conditioner when you purchase the new one.

Armed with this information, you will be able to hold your own when discussing the sizing of your air conditioning system when talking with residential air conditioning companies. The larger sizes of air conditioners come with higher operating costs, and higher purchase costs also. Remember, if you later decide to increase the size of your home or repurpose some of the rooms in the house, and need more home air conditioning capacity, both cooling and heating capacity, you can always use additional indoor air conditioner units.

Having decided on the size of your whole house air conditioner, you now want to move on to figure out what type of home AC unit you will pick.



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