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Air conditioning begins to expand to restaurants, drug stores, and large retail stores. The first window air conditioner is introduced in 1932 but is not mass produced.


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This overview of the benefits of zoning includes tips for selling to consumers and businesses. Tom Jackson discusses options for new construction and retrofit, as well as some ways a residential contractor can get into the light commercial business with zoning products. Speaker: Tom Jackson, CEO, Jackson Systems
With access to over one million professionals and more than 60 industry-specific publications, 




