Subtle details elevate the concealed vent flap from functional to fashionable. Meets the increased air-flow requirements of newer high efficiency HVAC Systems. Can be installed with an 8" or 7" diameter tube (not included). Adapter for 7" diameter tube is included.

• Concealed exhaust flap
• Locking positions: .75", 1", 1.25"
• 48 sq. in. net free ventilation area