Triangle Duct Board Box (Unassembled)

Our R6 (1.5") Duct Board Triangle Boxes are precision-cut for consistent performance and easy assembly. Made from high-quality fiberglass duct board, these boxes provide excellent thermal insulation and noise reduction. Shipping flat, they’re perfect for HVAC professionals who want to save space on the truck or in the shop while still having a reliable, high-quality product.

Available Sizes:
• 12" x 12" ID – 16" x 16" OD
• 14" x 14" ID – 18" x 18" OD
• 16" x 16" ID – 20" x 20" OD
• 18" x 18" ID – 22" x 22" OD

Don't see the size you're looking for? Contact Plenums Made Easy for custom orders.

Ask about volume pricing!