| Duct Shape | : | Rectangular |
| For Duct Size | : | 21 in |
| Height | : | 19.5 in |
| Material | : | Galvanized Steel |
| Product Type | : | Return Air Box |
This return air filter box is a straightforward solution for incorporating filtration into an HVAC system. It is engineered to fit a 21-inch return air duct, providing a proper housing to ensure effective air cleaning and protect system components.