What level of insulation in case the return duct of air that returns to a central / C were compared with the air supply?
Duct air return is on the roof (20 'run) in La Paz BCS MX lots of 100F days. Trane dealer has to make new channels without any duct insulation inside and outside F / G hitters 1.5 "is a skin tight corners. Does the remuneration normally get Lower level of insulation on a new installation?
The ductwork back interior is not necessary for all insulation. The temperature of the return air is almost equal to the temperature of the space, he is in. However, on its network Duct outdoors a different story. Local building codes dictate how much insulation, but more likely it is the same as the supply duct.
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