The Sheet Metal and Air Conditioning Contractors’ National Association will present a series of three Webinars on how to construct HVAC rectangular and round duct. The Sheet Metal and Air Conditioning ...
MANY YEARS AGO, I paid good money out of my own pocket to learn how to design a duct system. I won’t say to whom I paid this money, because I got ripped off. What I “learned” was how to find .1 on a ...
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