7″ Cape Backdraft Damper


Quantity discounts may be available, please call 800-222-5932 for a quote.

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ASTM E84 Testing Data

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The Cape Backdraft Damper will stop even the slightest amount of air from entering your home through bath fan ducts and dryer ducts.   The specially designed sleeve  closes down when the fan or dryer is off preventing any outside air from coming in.   With the fan or dryer on, the Cape Backdraft Damper opens up with almost no resistance allowing your appliance to perform at its maximum efficiency.  The specially formulated fabric sleeve allows maximum air flow only in the desired direction. The innovative design is easy to install in existing ducts. Unlike traditional backdraft dampers, the Cape Backdraft Damper has no mechanical parts to worry about sticking open or breaking.  This product will make your home more energy-efficient and comfortable. Proudly made in the USA.

The Tamarack Cape Backdraft Damper was featured on the “Today” show.


Quantity discounts may be available, please call 800-222-5932 for a quote.


  • Does not rust
  • Fits inside the duct (view here)
  • Maintenance free
  • Lifetime Guarantee
  • Made in the USA


  • Bathroom Exhaust
  • Clothes Dryer
  • Kitchen Range Hood*

UPS ground shipping to continental US addresses only. Canadian customers, please contact us for a quote.

*Inspect, clean or replace annually

Spec Sheet

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Installation Guide

Installation Video:

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7" Cape Backdraft Damper
7″ Cape Backdraft Damper