Dead Nuts Reliable Eight Inch Manual Duct Iris Damper For Round Hvac Vent Systems With Tough Steel Housing And Easy Turn Levers For Straight Up Airflow Regulation And No Sweat Setup

Single 8-Inch Manual Duct Damper For Balanced Room Airflow
✔️ Heavy steel build, 8 inch round size, quick lever adjustment

This single unit manual duct iris damper directs airflow and balances temperature in standard HVAC ventilation circuits. It mounts directly onto circular metal piping to help you shut off unused vents or manage room pressure without tearing apart your existing layout.

✅ 8 inch internal opening fits standard round flexible and rigid ductwork
✅ Smooth sliding track design lets you adjust volume in small precise increments
✅ Rust resistant steel plates withstand routine basement and attic conditions
✅ Basic bracket clamp setup installs straight away using common hand tools

💡 What helps maintain steady static pressure when routing air through multiple branch circuits?

You can tame uneven draft flows by swapping old open vents for this handy manual iris damper arrangement. Just follow these steps to lock in your perfect setting every time:
- Feed the eighty millimeter passage straight into your main trunk pipe without fighting sharp bends
- Slide the interlocking steel blades until you cut the wind completely or leave your preferred gap wide open
- Wedge the side mounts tight enough that furnace rumble never shakes loose your conditioned space supply

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