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Insulated sheet metal plenum.
Constructed of 26 gauge sheet metal the knock down design of the plenum takes up very little space and simplifies transporting to the job site.
Item 523685 model rab21rab21.
Winchester 20 5 in x 21 in x 28 in return air box assembly duct plenum.
Codewise supply plenums on furnaces must be constructed only of sheet metal nfpa 90b.
I noted this furnace has ductboard plenums note the plural.
W x 20 in.
Note that includes supply ducts within 36 of the supply plenum too.
Holes usually 2 duct shop fabrication processes 0.
And is designed for use with all heating and cooling applications.
Currently housed in an 80 000 square foot facility we have the capacity for your largest custom jobs whether you are installing hvac ductwork at a hospital a high rise a mall or an office building.
Plenum boxes insulated with duct liner for residential a plenum box fits over the inside unit and is the first stage of the air supply.
Since opening in 1987 sheet metal werks has grown on pace with increasing customer demand.
D x 47 in.