If your referring to the cooling portion of your central air conditioning the answer is no.
central air conditioning is invented in 1902. You can read the history of it and find out more information about air conditioning at en.wikipedia.org/wiki/Air_conditioning
A very good place to read about central air conditioning systems is consumer reports. They have a good guide on purchasing central air conditioning systems.
Air conditioning your home can be expensive if you run it all day long. If you have a window unit it will be more expensive than it would be if you have central air running all day.
Central air conditioning provide a uniform distribution of cool air in your home or work place. It creates a more comfortable environment. 80% of new homes built in the United States are built with central air conditioning.
Central air conditioning is centralling located and can be used to cool several units. It has a central control that controls temperatures for multiple rooms.
The cost of the average central air conditioning unit depends on a number of factors. The brand of air conditioning unit, the size of the room or building that one wishes to air condition, installation charges, and the location of the dwelling are just some of the factors that determine the cost of a central air conditioning unit.
how much do just the central air unit cost
how to check out the relay in a central air conditioning unit