Broan-NuTone® 634M Steel Roof Cap for 6-Inch Round Duct with Backdraft Damper and Bird Screen, Black Bluetooth take static pressure measurements across

take static pressure measurements across a blower and get the pressure differential with the push of a button to check drafts

chip-free cuts that require virtually no rework

5 GPM minimum flow for stable control for today’s high efficiency fixtures

Install the iWave-V in the airflow after the return filter

Broan-NuTone® 634M Steel Roof Cap for 6-Inch Round Duct with Backdraft Damper and Bird Screen, Black Bluetooth take static pressure measurements acrossBroan NuTone 634M Steel Roof Cap for 6 Inch Round Duct with Backdraft Damper and Bird Screen, Black The attractive Broan 634M roof cap is the perfect finish for your ventilation system. The built in back draft damper eliminates cold air from entering the home. The bird screen stops unwanted visitors from gaining entry. Specifications INSTRUCTIONS