Name: Byson Gravity Grille Anodized Aluminum with Gravity Shutter 20 x 20 inches – Weatherproof Ventilation for Walls and Crawl Spaces
SKU: 612990767
Price: 269.75 EUR
Availability: InStock
Rating: 4.230769230769231 (13 reviews)

Description

These grilles are used on exteriors of buildings at air exhaust points in the HVAC system. The design of the grille utilizes louvers which are closed by default due to gravity. When air is exhausted through the system, it forces the louvers open for the duration of the exhaust sequence. The louvers then naturally close again with gravity, preventing any air intake.
Please note per above that this louvers are by design not fixed open or adjustable, they open with force of exhaust air and fall shut with gravity.
Versatile Applications: They can be used in various applications that require permanent large-scale ventilation combined with screening. This includes air exhaust for ventilation or air conditioning systems, plant rooms, generators, workshops, garages, and pumping stations.
Robust Construction: Crafted from durable extruded aluminum sections, featuring a sturdy 2mm thick frame and 1mm thick blades.
Anodized Aluminum : The standard finish is a aluminum anodized coating that not only protects but also enhances the aesthetic appeal with its classy design.
Installation: Self tapping screws (not included) can be used to drill directly into the grille face or neck, depending on preference, and fix it to the surface (wall or wooden frame) as required.

Product description Review: works well and doesn't leak - Mine came without any space near the top leading to rain incursion, like was complained about in some of the reviews . . all the blades move freely, and don't bump into each other or the frame . . I like the frame, lotsa possibilities to mount without a hassle, the cast blades seem more durable than pressed sheet metal, and the small amount of extra weight is nice when the wind blows at JUST the wrong angle to try and lift 'em . . . we get kinda whippy-windy in the "Authentic Northwest", which can leave you up at night and cranky, so when the blades don't flop, I sleep better . . . . Review: Perfect replacement vent cover! - This grill is a total winner. I was struggling to find a vent that could fit a large hole in the siding after removing a relic of a vent from a 1920"s flip. I went to several local hardware stores, home depot and lowe's included to find a vent that was gravity assisted (in that when my tenants turned it off, it would close and not allow bugs or cold air come back in but also allow hot air from the shower and dryer escape easily. This grill had everything I was looking for including a nice, low profile design, and it was affordable. Sure beats what was there before! I installed it myself, instead of paying the fortune that I was quoted for a couple of HVAC guys to put other vents in. Do it yourself all the way!! Easy handling, light and not heavy, quiet and durable. Perfect fit!

Reviews

I**N

works well and doesn't leak

Mine came without any space near the top leading to rain incursion, like was complained about in some of the reviews . . all the blades move freely, and don't bump into each other or the frame . . I like the frame, lotsa possibilities to mount without a hassle, the cast blades seem more durable than pressed sheet metal, and the small amount of extra weight is nice when the wind blows at JUST the wrong angle to try and lift 'em . . . we get kinda whippy-windy in the "Authentic Northwest", which can leave you up at night and cranky, so when the blades don't flop, I sleep better . . . .

9.04.2026

S**E

Perfect replacement vent cover!

This grill is a total winner. I was struggling to find a vent that could fit a large hole in the siding after removing a relic of a vent from a 1920"s flip. I went to several local hardware stores, home depot and lowe's included to find a vent that was gravity assisted (in that when my tenants turned it off, it would close and not allow bugs or cold air come back in but also allow hot air from the shower and dryer escape easily. This grill had everything I was looking for including a nice, low profile design, and it was affordable. Sure beats what was there before! I installed it myself, instead of paying the fortune that I was quoted for a couple of HVAC guys to put other vents in. Do it yourself all the way!! Easy handling, light and not heavy, quiet and durable. Perfect fit!

16.07.2025

A**R

Aluminum gravity damper

Product was as advertised

12.07.2025

A**R

PERFECT

PERFECT IT FIT AND DELIVERD ON TIME

25.07.2025

S**I

Good grill

Easy to fit.

11.09.2024

M**T

It works perfectly

Just what I needed

2.09.2024

T**S

This is how it came out of the box

Item was damaged...

19.03.2024

B**E

Cheaply made

They clink and clank when the wind blows

12.02.2025

D**M

Très bien... 😉

Très bien construit...

12.10.2025

S**E

Great value.

Does the job well. Was exactly what we needed for our greenhouse. Very happy with this item. Highly recommend!

14.08.2024

B**N

Quality unit

Well packaged. Nice finish. Good seal.

22.03.2024

R**N

Gravity vent

It serves my purpose. Light and easy to install. Also came in a proper packaging.

22.11.2025

S**N

Problème l’entrer d’air

Dans les spécifications il est marqué entré d’air et sortir il a pas rien qui retiens les lames ouverte alors l’ air ne peut pas rentrée

16.02.2024

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€ 269.75

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

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ASIN	B0CLT35R3P
Batteries Required?	No
Best Sellers Rank	#169,081 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #977 in Registers, Grilles & Vents
Customer Reviews	4.4 4.4 out of 5 stars (44)
Date First Available	October 26, 2023
Item Weight	2.99 pounds
Manufacturer	Byson
Package Dimensions	22.5 x 22 x 2.5 inches
Size	20x20 inches

Byson Gravity Grille Anodized Aluminum with Gravity Shutter 20 x 20 inches – Weatherproof Ventilation for Walls and Crawl Spaces

Description

Specifications

Reviews

Common Questions