First off, an air conditioning system doesn’t blow cold, it removes heat. The process of air conditioning takes air being pulled in from the return air intake through a framed in chase or by duct to your blower and pushed or pulled across an evaporator coil. There is refrigerant being pumped through the system by a compressor, there are two coils in the system, condenser, and evaporator. The purpose of these coils is to reject heat and adsorb heat, the indoor coil (evaporator) absorbs heat, and the condenser coil rejects or releases heat. Through this process we achieve cooling, a residential home usually requires 5-7 air changes per hour. Through these air changes the air being forced through the evaporator coil, heat from the air is absorbed by the refrigerant dropping the air temperature by 18-22 degrees across the evaporator coil. Example: if air entering the evaporator coil is 80 degrees and the temperature drop is 20 degrees the leaving air temp would be 60 degrees.

As air continues to circulate through the home the heat from the air is constantly forced across the evaporator coil, as the intake air temperature decreases, the leaving air decreases as well. The result is cool air moving through the home. Proper air flow seems to be one of the biggest issues in the HVAC industry, improper air flow leads to decreased capacity, systems under or over charged and decreased life of the system. Manufactures design air conditioning systems to operate at 400 CFM per 12,000 BTUH of cooling capacity. Issues that restrict the proper required air flow are clogged air filters, dirty evaporator coils, blower speed and poorly designed duct work.

Example: if you have a 3-ton system 36,000 BTUH you should have 1200 CFM of air flow to adequately cool your home, if the indoor evaporator coil has dirt/debris and the air flow is diminished by 20% the result would be 960 CFM which equals 2.4 tons or 28,800 BTUH of cooling capacity. The basic operation of the HVAC system in the home is controlled by an automatic control the Thermostat which the homeowner sets to their desired comfort level and brings the system on to maintain that comfort level. When a demand call for cooling is initiated the indoor blower, outdoor compressor and fan motor cycle on to start the cooling process, and depending on the temperature of the home the run times will vary to reach the set point or temperature setting of thermostat. For more information, please visit: https://totalcomfortsolutionsac.com/

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