I is said to keep out birds, does it have a screen that would keep out yellow jacket.?

The screen is for birds, the backdraft damper will keep the bugs out. That's the door that will open when your vent fan creates pressure in the ductwork. Gravity will close the door once the fan is off.

Does the wind cause it to chatter?

no the "gate" only opens when in use. the wind cannot open it, unless you have 100+ mph winds.

Can this be installed on a new residential steel roof?

It depends on whether there is a flat spot wide enough for it to fit between the ridges in the steel. You need a gap of 12 to 14 inches that it can fit in. If it fits it can be screwed directly into the steel and then seal with roofing cement.

Can this be used to vent a cooktop hood?

Yes, it's the best 1 I have found for hood venting, it has a dam per door built in to keep air from entering from outside also. I use them on all my roof venting jobs.

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Broan-NuTone 634M Steel Roof Cap for 6" Round Duct, For Range Hoods, LoSone Fans, and Bath Ventilation Fans, Black

4.5/5

Product ID: 312028962

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🐦Integrated bird screen for pest protection

🌬️Built-in backdraft damper for airflow control

🛠️24-gauge CRCQ steel durability

Description

🏠 Elevate your airflow game with Broan-NuTone’s sleek, steel-strong roof cap!

AIRFLOW MASTERY - Built-in backdraft damper optimizes ventilation efficiency while minimizing unwanted noise.
PEST PROOF PEACE - Integrated bird screen keeps your ventilation system free from unwanted guests, ensuring uninterrupted performance.
EFFORTLESS UPGRADE - Simple, flexible installation tailored for range hoods, LoSone, and bath ventilation fans—upgrade your home ventilation hassle-free.
STEEL CLAD STRENGTH - Crafted from robust 24-gauge CRCQ steel with a sleek black epoxy finish for lasting resilience and style.
PERFECT FIT PRECISION - Designed for a secure, balanced footprint of 18.75" x 14.25" to seamlessly fit 6" round ducts.

The Broan-NuTone 634M Steel Roof Cap is a durable, high-performance ventilation accessory designed for 6" round ducts. Constructed from sturdy 24-gauge CRCQ steel with a black epoxy finish, it features a built-in backdraft damper and bird screen to maximize airflow efficiency and protect against pests. Its well-balanced 18.75" x 14.25" footprint ensures a secure fit for range hoods, LoSone fans, and bathroom ventilation systems, making installation straightforward and reliable.

Specifications

Manufacturer	Your Other Warehouse
Part number	686283
Item Weight	1.81 Kilograms
Product Dimensions	4.01 x 36.2 x 20.47 cm; 1.81 kg
Item model number	634M
Size	6"
Color	Black
Material	Steel
Pattern	Solid
Power source type	AC
Item Package Quantity	1
Plug Profile	Built-In Mount
Special Features	Adjustable
Batteries Included?	No
Batteries Required?	No

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