This article first appeared in Engineered Systems. View the original post in its entirety here. Variable refrigerant flow (VRF) systems were first introduced to the HVAC community in Japan in 1980 as ...
Buying a new HVAC system is one of the most important purchases you can make for your home. Consumer Reports indicates that more than 75% of U.S. homes use air conditioning, and 90% of new homes are ...
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