Can this be mounted horizontally?

Yes, I put it in a room AC vent, to outside, it wasnt at a 90 degree angle, appr a 45 anyway, nice product, spring loaded, working great for me

Can the 12" mount vertically? My application need is for my kitchen exhaust fan which exits into attic.

NOTE: by most state's codes; nothing should be openly venting into the attic. I can run through the attic, but needs to be vented outside. That said, the flapper is spring loaded and is opened by the force of the airflow created by your exhaust fan. I suspect it can be mounted vertically, just make sure the flappers are oriented so they open in the direction of airflow (upward) when the exhaust fan comes on. Hope this helps.

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🚀 Upgrade your airflow game with the ultimate 4" backdraft damper!

OPTIMIZED AIRFLOW CONTROL - Prevents backdrafts effectively, enhancing ventilation efficiency in bathrooms, kitchens, and dryer exhausts.
HEAT RESISTANT PERFORMANCE - Operates flawlessly in extreme temperatures from -22°F up to 400°F, perfect for indoor and outdoor use.
EFFORTLESS DIY INSTALLATION - Press-on design compatible with montage glue, tape, or steel clamps makes setup fast and hassle-free.
BUILT TO LAST STEEL ALUMINUM - Robust 4" steel body with aluminum valve flaps ensures long-term durability and peak performance.
UNIVERSAL FIT FOR FLEX STRAIGHT DUCTS - Seamlessly integrates with both flexible and straight Ø4 inch ducting systems for versatile HVAC solutions.

The ECOPRO VENT 4" Backdraft Damper combines durable steel construction with aluminum valve flaps, designed for easy installation on both flexible and straight ducts. Heat-resistant from -22°F to 400°F, it ensures reliable backflow prevention for bathroom, kitchen, and dryer exhaust systems, delivering efficient ventilation indoors and outdoors.

€ 134.26

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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Brand	ECOPRO VENT
Colour	Silver
Electric fan design	Exhaust Fan
Power Source	Corded Electric
Style	Modern
Room Type	Bathroom
Special Feature	High Velocity
Recommended Uses For Product	Cooling, Exhausting
Wattage	60 Watts
Finish Type	Painted
Collection Name	Bathroom,Kitchen
Switch Type	Push Button
Included Components	Cord
Indoor/Outdoor Usage	Indoor
Model Name	9cbd9b70-f7c7-4bf2-bb79-7c8bcd5728bd
Control Method	Touch
Blade Material	Plastic
Is It Cordless?	No
Number of Power Levels	1
Manufacturer	ECOPRO VENT
Size	4"
Item model number	9cbd9b70-f7c7-4bf2-bb79-7c8bcd5728bd
ASIN	B08XXT326K

- 4" Inch Backdraft Damper for Straight or Flex Duct. Bathroom Exhaust Fan. Kitchen Hood Exhaust Fan and Different Dryer Fan Backflow Preventer. Steel Damper with Aluminum Valve Flaps (4")

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