1903 was a very significant year — it was the year that the New York Stock Exchange building in New York City become one of the first structures to use an air conditioning system. Since then, virtually every building in the country comes with an HVAC system, effectively regulating its internal climate.
The heating and cooling services industry has grown to be worth an estimated $71 billion dollars in the United States, employing over 300,000 people in over 85,000 HVAC businesses. And it’s still growing; between 2009 and 2014, the HVAC industry was estimated to have grown more than 4% annually. That heating and cooling services have become so integral should come as no surprise. People cannot avoid the necessity of furnace installations for the winter and the freedom offered by air condit