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This control switches electrical loads from relays, fans and motors in HVAC and commercial applications in response to changes in refrigerant pressure. This SPST type switch's low-pressure range is 10 - 100 psig, high-pressure range is 150 - 450 psig and can be reset manually. Order item #12Z407 from Grainger.


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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, 




