The most common central cooling system is a split system. This includes an outdoor unit containing a condenser coil and compressor motor that is located inside the condenser unit. The condenser and compressor are hooked up to your indoor air handler (furnace). The main component in your air handler that the condenser and compressor is hooked up to is called the evaporator coil. The compressor motor pumps a chemical called refrigerant (Freon) through the system.
How It Works
Once your thermostat calls for cool air, the warm air inside your home is sucked in through the return registers or vents either located in each of the rooms or by one big main vent in the hallway. The warm air returns back to your air handler (furnace). This warm air blows across the indoor evaporator coil.
The warm air or heat energy transfers to the refrigerant (freon) inside the evaporator coil. This transfer or heat getting absorbed into the refrigerant (freon), in turn, “cools” the air. The air handler (furnace) now blows the cool air back into the house through the ductwork and finally out your supply registers or vents into your rooms of the house.
The refrigerant (freon) that absorbed the warm air or heat energy from your home is now pumped back to the compressor motor located inside the condenser. Once the warm air or heat absorbed by the refrigerant (freon) reaches the condenser, it is released outside your home as the fan motor that sits on top of your condenser blows in an upward motion.
This cycle repeats over and over again. Moisture that contributes to humidity inside your home is also condensed out into the air.
Your cooling system is usually combined with your central heating system because they share the same duct work for distributing conditioned air throughout your home.
- Central air conditioning helps keep your home cool and reduces humidity levels. This will keep you comfortable during the hot summer months.
- As your central air conditioning system draws air out of the various rooms in the home through the return air ducts, the air is pulled through an air filter. This will remove airborne particles such as dust and lint. Other type of filters may remove microscopic pollutants as well. The filtered air is then routed to air supply duct work that carries it back to the rooms. This will make your air cleaner inside your home.
- Because the compressor unit is located outside your home, the indoor noise level from its operation is lower than that of a window or through the wall air conditioning unit.
How to Properly Size a Central Air Conditioning System
When you install central air conditioning, size matters. Calculations must be done for you home. Every home is different. If you underestimate your cooling needs, you could be hot and uncomfortable. If you get a unit that is too powerful could leave you becoming too cold and clammy from the humidity that was not removed because the unit will turn on and off with a short cycle. When calculating the correct cooling equipment size for your home, one should refer to the Air Conditioning Contractors of America (ACCA) Manual J.
If you already have the duct work in your home for your heating, adding a central air conditioner system will cost less. But keep in mind that the ducts used for existing heating might not be the correct size or may not be in the right location for optimal cooling to be distributed.
Also one should use a duct sizing calculation method such as from the Air Conditioning Contractors of America ACCA Manual D. The duct sections must be properly sized and that there are enough supply registers or vents to deliver sufficient air to the right places in your home. Leaks or uninsulated ducts from your existing ductwork system can reduce the efficiency considerably. All joints and seams where the ducts join together must be sealed with the proper UL rated 181 foil faced tape. Not with the typical grey duct tape that will eventually dry and fall off.
If your home doesn’t have existing ducts, installing new ducts can be very expensive. However, if you plan to cool your entire home, a central air conditioning system is typically the best choice.
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Richard Marton Electrical Contractor LLC is a full service electrical contractor serving homeowners and businesses in Bergen, Passaic, Essex and Morris County New Jersey with electrical installations and repairs. We are also a Generac Generator installer.
Richard Marton Electrical Contractor LLC works with general contractors, residential architects, interior decorators, interior designers, painters, property management and property maintenance professionals, and professional organizers. We work with these professionals to give clients top of the line electrical installations within such projects as residential remodeling, residential renovations, plus build outs of new kitchens, bathrooms, home offices, add-a-level residential project and more.