Frederick Air, Inc
3 King Avenue
Frederick, MD 21701
Phone: (301) 663-0300
Fax: 301-662-1042

Business Hours: 8:00am to 5:00pm

Evening and Weekends Available by Appointment

Need a Service Call or New System Installation?

We want to make it affordable and easy to have your HVAC equipment serviced or repaired. Should you need a new AC installation or a new heater, we'll work with you to stay within your budget.

Our knowledgeable staff is ready with the latest information about programs that you can take advantage of to save you money on new heating and cooling equipment for your home.

Call us today to discuss our flexible financing options. Keep your system running in tip-top condition and stay cool and comfortable all year long.

Be sure to print out our Internet coupons where you can find money-saving discounts on products and services.

Save Money On Air Conditioning

Call Us: (301) 663-0300


24 Hour Service

Our friendly technicians are available 24 hours a day for your emergency service needs. Simply give Frederick Air, Inc a call, day or night, and let one of our technicians help you with your problem. We are always here to assist you.

How Does Air Conditioning Work?

Frederick Air | September 16, 2018

Your air conditioning (known as AC) is a system that removes heat and moisture from an enclosed space, be it a home, office, warehouse, car, and so on, usually to improve the living conditions for those inside. Interestingly enough, your air conditioning system works more or less the same as your refrigerator. The significant difference is the size of the space each has to cool. The way AC works, however, revolves around some pretty simple principles.

The Cooling Process

A typical AC unit comprises three major parts: the compressor, condenser, and evaporator. And while the first two are usually located outside of the building, the evaporator is located inside.

The entire system makes use of certain chemicals, known as refrigerants, that can quickly turn from gas to liquid and back again. These refrigerants will transfer the heat from the inside air to the outside.

In short, this cooling fluid goes to the compressor as a low-pressure gas where it is squeezed into a high-pressure gas, raising its density and temperature, in the process. It is then moved into the condenser, and the refrigerant is turned into a liquid because of the high-pressure.  

From here, the liquid coolant makes its way into the evaporator through a tiny hole, but in doing so, its pressure immediately drops back again. When this happens, the refrigerant immediately returns to its original gaseous state, but not before absorbing the heat found in the surrounding air.

The heat is required for the coolant to separate its molecules when it goes from a liquid to a gas. The metal fins found on the evaporator also help facilitate the exchange of thermal energy. 

The Cooling Cycle

The moment when the refrigerant leaves the evaporator, it is once again a chilled, low-pressure gas, as it was before. The entire process will start all over again when the coolant makes its way back into the compressor. 

There is a fan located within the evaporator that will circulate the air inside your residence as well as the evaporator's fins. By making use of a vent, the AC unit will suck air inside itself, cooling the refrigerant gas inside the evaporator, removing the heat from the air, in the process.

The chilled air is then blown back inside the house through a series of ducts. 

This cycle will continue until the indoor air reaches the desired temperature. A thermostat will sense the ambient air temperature and will shut down the AC system, the moment it detects that the optimal temperature has been reached. When the indoor space begins to heat up, the AC unit will also start up again. 

This is the shortened version of how an air conditioning system works. Luckily, however, you don't need to know all the inner workings of the system for you to enjoy its effects. With Frederick Air, you will be able to make the most out of your AC unit without having to worry about going without during a heat wave!

If you do encounter any issues with your system, please feel free to contact us directly. 


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