Four Inch Square Plenum Box With Air Tight Knockouts, 2-1/8 Inch Deep, Gray, UL Listed, 30.3 Cu In Capacity, Eleven 1/2 Inch And Five 3/4 Inch Knockouts, Drawn

Single 4-In Square Plenum Box with Air-Tight Knockouts
✔️ 4 in square, 2-1/8 in deep, gray, UL listed, 30.3 cu in, 11 x 1/2 in & 5 x 3/4 in knockouts

This four-inch square plenum box is designed for mounting in walls or ceilings where air flow must be contained. It features drawn steel construction, air-tight knockouts, a gray finish, and UL listing for safety and code compliance.

✅ Drawn steel construction for clean wiring paths
✅ UL Listed for safety and code compliance
✅ 30.3 cu in capacity for splices and devices
✅ Eleven 1/2 in knockouts and five 3/4 in knockouts
✅ Air-tight knockouts for plenum use
✅ Gray finish matches common installations

💡 What is a plenum-rated square electrical box used for in HVAC or electrical installations?

Used in return air paths, these boxes seal wiring and prevent leaks or contamination in air-handling spaces. - Handy for ceiling or wall runs with air-path needs - Helps meet building codes by sealing knockouts against air flow - Compatible with standard 1/2 in and 3/4 in knockouts - UL-listed for safety and reliability