Marrs HVAC Services, LLC is a leading international Mechanical Design service. Our innovative designs and effective pricing promote professionalism worldwide. We work with Homeowners, HVACR companies, General Contractors, & Engineers to execute our commitment of Energy efficiency and total comfort.
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Standard Manual J, D, S
for a home in the western, mid, & NE USA
Typically these homes are metal duct systems with the supply grille close to the exterior wall which has the greatest Heat loss/gain. Sometimes they may also incorporate flex no longer than 3’ in length. The metal Trunk will be either rectangular or round.