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  1. HVAC Codes and Certifications
    The regional standards established by the Department of Energy (DOE) that are set to go into effect May 1, 2013. For the first time, the HVAC industry is being regulated not on what is being manufactured, but rather what is being installed. What does this mean to you? Starting May 1, 2013, gas...
    90% efficiency furnaces furnaces high efficiency furnaces hvac standards
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