![Winchester 47-in x 20-in x 20-in x 47-in Trim-to-Fit Universal Plenum in the Duct Plenums department at Lowes.com Winchester 47-in x 20-in x 20-in x 47-in Trim-to-Fit Universal Plenum in the Duct Plenums department at Lowes.com](http://mobileimages.lowes.com/productimages/03499485-488e-42ef-9f49-5a64efdd463d/03154879.jpg)
Winchester 47-in x 20-in x 20-in x 47-in Trim-to-Fit Universal Plenum in the Duct Plenums department at Lowes.com
![Air plenum box air duct box supply air grille, View supply air filter grille, Greenairsys Product Details from Foshan Greenairsys HVAC Equipment Co., Ltd. on Alibaba.com Air plenum box air duct box supply air grille, View supply air filter grille, Greenairsys Product Details from Foshan Greenairsys HVAC Equipment Co., Ltd. on Alibaba.com](https://sc04.alicdn.com/kf/HTB1cwDheCSD3KVjSZFKq6z10VXaX.jpg)
Air plenum box air duct box supply air grille, View supply air filter grille, Greenairsys Product Details from Foshan Greenairsys HVAC Equipment Co., Ltd. on Alibaba.com
![IMPERIAL 24-in x 24-in x 24-in Insulated Fiberglass Duct Plenum in the Duct Plenums department at Lowes.com IMPERIAL 24-in x 24-in x 24-in Insulated Fiberglass Duct Plenum in the Duct Plenums department at Lowes.com](http://mobileimages.lowes.com/productimages/31641b88-fb41-46d2-9e0f-bf9dc9745a8a/04054915.jpg)