Residential Air Conditioning 2018-05-16T19:48:43+00:00


Hillestad Heating and Cooling sells only products manufactured by the most trusted names in the industry. Products proven to be energy efficient, cost efficient and environmentally safe.

How Central Air Conditioning Systems Work

The typical central air conditioning system is a split system, with an outdoor air conditioning, or “compressor-bearing unit” (commonly known as a condenser) and an indoor coil (also known as an evaporator), which is usually installed on top of the furnace in the home.

Using electricity as its power source, the compressor pumps refrigerant through the system to gather heat from indoors and remove it from the home.

Heat and moisture are removed from the home when warm air from inside the home is blown over the cooled indoor evaporator coil. The heat in the air transfers to the coil, thereby “cooling” the air. Moisture is collected by the cold evaporator, creating condensation which then flows to the floor drain for removal.

The indoor evaporator maintains a temperature of roughly 35 degrees, while the cooled air is pumped back inside, helping to maintain a comfortable indoor temperature.


Central air conditioning helps keep your home cool and reduces humidity levels.

Cleaner air – As your central air conditioning system draws air out of various rooms in the house through return air ducts, the air is pulled through an air filter, which removes airborne particles such as dust and lint. Sophisticated filters may remove microscopic pollutants, as well. The filtered air is then routed to air supply duct-work that carries it back to other rooms in the house.

Quieter operation – Because the compressor-bearing unit is located outside the home, the indoor noise level from its operation is much lower than that of a free-standing air conditioning unit.

Energy Star

ENERGY STAR is a program that was created by the US Environmental Protection Agency (EPA) to help businesses and individuals make energy efficient purchases.

This program places the ENERGY STAR label, a small blue and white logo, on items that meet superior energy efficiency standards. This label provides an easy way for consumers to identify quality, high-efficiency products.

For more information about the Energy Star program, please view the Energy Star website.

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