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  1. toolbag

    Return Air Temperature Industry Standards

    I have Lennox roof top HVAC units. Most are 10 to 20 years old. They range from 5 ton to 10 ton with economizer inlets. Are there set standards for the return air temperature coming back into the unit? I have approx 58 to 63 degree's F leaving the different units entering the building. For some...

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