There is more to consider than the just the square footage of your home! Be sure to choose a contractor who will size your central AC system according to Manual J, a standard developed by the Air Conditioning Contractors of America (ACCA). Make sure your central air conditioner system is sized correctly. When the central air conditioner is too small, it will not be able to sufficiently cool your home. ![]() If your central air conditioning system is too large, it will cycle on and off throughout the day, which can waste electricity. They will use this information to make a recommendation for the proper sized AC system. Your HVAC contractor should inspect the interior and layout of your home, as well as the raw square footage. One ton of cooling power equals 12,000 BTU/hr. This is sometimes referred to as “tons” – which doesn’t refer to the weight of the unit, but the BTU/hour, or cooling power. An air conditioner’s cooling capacity is measured in a size known as British thermal units per hour (BTU). One thing that may be confusing when you are shopping for a new central air conditioner is how the size is referenced. Split-systems and mini-splits also work well in all climates. They are a good option for homes that do not have existing ductwork. Split-systems cost a bit more than packaged air conditioning units. One main advantage of ductless split-systems is you can cool specific rooms. The indoor unit is usually mounted to the wall in each room. The evaporator coil is usually contained in the cabinet or supply air duct of the furnace or heat pump. An indoor unit is oftentimes connected to a heat pump or furnace. ![]() Split systems usually have the condenser and compressor in an outside unit. The advantage of packaged air conditioners is they provide even cooling throughout the house. The cooled air is usually circulated through the home using ductwork. In a packaged central air conditioner, the condenser, compressor, and evaporator are usually housed together in an outdoor unit. There are two main types of central air conditioners, packaged and split-system. Types of Central Air Conditioning Systems
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