
24X21X36R6 – PLENUM
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
A plenum is the sheet metal box that connects your air handler or cased coil to the ductwork in your home. If you’re replacing an air handler or adding ductwork, you’ll need one that matches your unit’s opening size. This one measures 24″ x 21″ at the opening and is 36″ long.
Specs: 24″ x 21″ opening, 36″ length, R6 fiberglass insulation, galvanized steel
Replaces: Universal — fits any air handler or coil with a 24″ x 21″ opening
Fits: Air handlers and cased evaporator coils with a matching 24″ x 21″ opening from Goodman, Rheem, Trane, Carrier, Lennox, and others
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- 21X24X36R
- 24X21X36R6
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.




