Best Range Hood Backdraft Damper

Imperial VT0568 6-Inch R2 Premium Roof Vent Cap with Collar, Black

Highest Rated Premium Airflow Control Backdraft Dampers.
Spring-loaded butterfly aluminum damper blades encased in a 20-guage galvanized steel housing.
May be installed in any position or orientation to prevent backflow and designed for use in AC, Heating, Vent and other HVAC application temperatures....
Extremely easy and secure inline duct insertion installation. Available in 4", 5", 6", 7", 8", 10", 12", 14" and 16"..
Minimal pressure to open. 0.04 to 0.08 in. w.g. Maximum automatic back flow protection.

...meets wall, drill holes through wall at the corners of the outline, saw outline from interior, tuck installation into wall, saw outline from exterior, caulk/tape (not included) vent frame, press vent into opening, secure vent with the included screws, reinstall hood.
KEEP OUT THE BUGS & ELEMENTS: Features an RV hood damper that allows the external flap door to open when the exhaust fan is turned on while the 2 swivel friction locks latch the single flap (runs the length of the vent) in the closed position when traveling down the road.
Flapper stays in the closed position and only opens when engaged by turning on exhaust fan which them pushes the flapper open from the airflow.
PACKAGE CONTENTS: RV stove vent cover replacement package includes (1) polar white range vent for RV with (10) installation screws for your convenience.

Highest Rated Premium Airflow Control Backdraft Dampers.
Spring-loaded butterfly aluminum damper blades encased in a 20-guage galvanized steel housing.
May be installed in any position or orientation to prevent backflow and designed for use in AC, Heating, Vent and other HVAC application temperatures....
Extremely easy and secure inline duct insertion installation. Available in 4", 5", 6", 7", 8", 10", 12", 14" and 16"..
Minimal pressure to open. 0.04 to 0.08 in. w.g. Maximum automatic back flow protection.

duct and the rubber flap will seal off drafts coming in from your dryer vent or bathroom exhaust fan. Make sure the flaps open away from the ventilator. The outer rubber ring creates a seal around the strong plastic body giving you the perfect vent damper..
FLEXIBLE This backdraft damper's main recycled plastic part is small enough to fit into almost all PVC, metal, and other ducts with 4 inch size. No need to buy multiple products to find the one that works. Purchase with ease and relax in your draft free living space..
CONVENIENT This 4 inline damper duct valve gummi flaps are easy to open for almost all dryers or booster fans. The lack of moving spring will ensure a long lifespan that will save you time and money. As the product is made out of weather-resistant plastic, you can install the dryer damper in high-humidity environments..
WELL MADE It works in any orientation even 45 degrees or 15 for that matter. The rubber seal is quieter than all metal or plastic models. This will ensure you will not be disturbed by constant annoying rattling from cheaper models..

Highest Rated Premium Airflow Control Backdraft Dampers - Used Specifically for 5" Duct Size Applications.
Spring-loaded butterfly aluminum damper blades encased in a 20-guage galvanized steel housing.
May be installed in any position or orientation to prevent backflow and designed for use in AC, Heating, Vent and other HVAC application temperatures....
Extremely easy and secure inline duct insertion installation. Available in 4", 5", 6", 7", 8", 10", 12", 14" and 16"..
Minimal pressure to open. 0.04 to 0.08 in. w.g. Maximum automatic back flow protection.

Aluminum Ducting Specifications: Diameter 6 inch, 25 feet long.
four-layer design (PVC layer + aluminum foil + PET + aluminum foil). PVC is thermoplastic, high temperature resistant and corrosion resistant. Temperature range: -22°F~212°F(-30℃～100℃)..
Flexible Ducting: the aluminum foil duct tube can bend in any direction, allows you to accommodate most space restrictions. Flexible length for inline fan, quick and easy to set up..
Backdraft Damper Material: It's made of a Galvanized steel and can withstand temperatures from 14 to 140 °F. 2 spring-loaded wings prevent the reverse airflow movement through the ventilation duct when the ventilation system is turned off..
Low Noise Design: It has an internal foam strip and a smooth-running spring to keep the valve wings from rattling. The position of the spring should be horizontal for horizontal installations so that it can open and close optimally..
Bundled Accessories: 1 pack black aluminum ducting and a pair of 6-inch metal clamps for fixing the hose..

Highest Rated Premium Airflow Control Backdraft Dampers.
Spring-loaded butterfly aluminum damper blades encased in a 20-guage galvanized steel housing.
May be installed in any position or orientation to prevent backflow and designed for use in AC, Heating, Vent and other HVAC application temperatures....
Extremely easy and secure inline duct insertion installation. Available in 4", 5", 6", 7", 8", 10", 12", 14" and 16"..
Minimal pressure to open. 0.04 to 0.08 in. w.g. Maximum automatic back flow protection.

Overall sizing is 12-3/4″ wide x 5-5/8″ high. Duct fitting protrudes 4-7/8″ from back of cap to allow proper fit to the ductwork (NOT for use with dryer venting).
Equipped with a spring-loaded backdraft damper and bird screen to keep nests and small animals on the outside.
Wall cap is made of 24 gauge CRCQ steel construction with a black electrically-bonded epoxy finish for durability and long life.

Stainless-steel-sheathed heating element features Nichrome wire with magnesium oxide for optimal heat transfer and electrical insulation at elevated temperatures.
WhisperWarm fans feature a totally enclosed condenser motor and a large, double suction blower wheel to quietly move air.
This fan is designed to give you continuous, trouble-free operation for many years thanks in part to its high-quality components and permanently lubricated motors which wear at a slower pace.
Built-in damper to prevent backdraft, which helps to prevent outside air from coming through the fan.