Winchester 20 5 in x 21 in x 28 in return air box assembly duct plenum.
Insulated sheet metal plenum.
The trim to fit plenum fully assembled measures 20 in.
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.
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.
Holes usually 2 duct shop fabrication processes 0.
Since opening in 1987 sheet metal werks has grown on pace with increasing customer demand.
And is designed for use with all heating and cooling applications.
Codewise supply plenums on furnaces must be constructed only of sheet metal nfpa 90b.
W x 20 in.
I noted this furnace has ductboard plenums note the plural.
D x 47 in.
Contact a location arizona lake havasu city arizona 928 846 8707 peoria arizona 480 385 1380 california anaheim california 714 933 1777 chatsworth california 818 884 1100 chino california 909 267 1124 el cajon california 619 566 8130 escondido california 760 233 2545 la habra california 562 257 1133 laguna hills california 949 598 8333 oceanside california 760 797 6234.
Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating ventilating and air conditioning ducts and plenums operating at temperatures between 40 f 4 c and 250 f 121 c.
Lined metal or board return ductwork upstream from an effective filter is not usually a problem.