Plastic Plenum Boxes

Plastic Plenum box for ducting termination to house exterior. Suitable for external louvre grill connections. Available in 3 sizes:
200 x 200 (mm) Spigot size 150 (mm)
250 x 250 (mm) Spigot Size 200 (mm)
300 x 300 (mm) Spigot Size 250 (mm)