A: Hi, We need more information. Please contact Customer Service at Hamilton Home Products 1-800-879-0123
A: Unfortunately, this product is not designed or approved for that application.
A: Home Depot's system shows this as being frequently purchased together, which can be confusing to customers as the maximum size of the plenum is 20 in. W x 20 in. D, and this WILL NOT fit the supply opening. You will need to have a local sheet metal shop make a plenum to your specifications as that will simplify the installation. You did the right thing by asking this question.
A: Sorry, we order these from a manufacturer and it is only available with one end cap. It is sheet metal, are you able to make/cut an additional end cap?
A: Sorry, an additional end cap is not available as these plenum kits are mass produced. If you are in need of a complete enclose box, please have a look at models RAB 17, and RAB 21 to see if the dimension will be suitable for your application. RAB 17 [20.5”h X 17.5”w X 28”d For 17.5” wide applications.] RAB 21 [20.5”h X 21”w X 28”d For 21” wide applications.] Otherwise, a local metal shop should be able to custom make the box for your application. We hope this is helpful.