How to Keep Your Heating and Air Conditioning Unit Working Properly

How to Keep Your Heating and Air Conditioning Unit Working Properly

In 1903, the New York Stock Exchange in New York City became one of the first buildings to use an air conditioning system to regulate indoor temperatures. Today, over a century later, the United States heating, ventilation and air conditioning, or HVAC, industry is worth an estimated $71 billion dollars. Moreover, this industry is growing:

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