Does the screen freeze in the winter?

Not yet it’s under the wave so moisture is not a problem

What is the measurement between back of flange and tabs? Is this for 3/8" or 1/2" (other) drywall?

Yikes. I don't recall tabs. I'm pretty sure they are universal. I'm almost certain they would be fine with either. I'm using them as air intakes for my engine on my boat. They are mounted in 3/16" Fiberglass. I did use an adhesive sealant as they are in my cockpit out in the elements.

Is the diameter of the hole required four inches or is the diameter of the grill four inches?:

I used a 4-1/8 cutter and it fit just fine. The actual dimension of the round sleeve that your vent tube slides onto is 3.7"

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Soffit Vent

Product ID: 57880113

Details

Brand
HG Power
Color
White
Item Weight
0.11 Kilograms
Material
Acrylonitrile
Vehicle Service Type
Bike Car Truck

🌀4-inch optimized airflow

🕸️Built-in protective screen mesh

🛡️Durable ABS material

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€ 16.17

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In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌀 Elevate your air game — breathe smarter, live better!

BUILT TO LAST - Premium ABS construction ensures long-term durability and low maintenance
CLEAN PROTECTED - Integrated screen mesh keeps pests out while maintaining fresh air circulation
SLEEK SUBTLE DESIGN - Minimalist white finish blends seamlessly into any modern space
EFFORTLESS AIRFLOW CONTROL - Easily adjustable white panel for personalized ventilation
VERSATILE MOUNTING OPTIONS - Lightweight design supports both wall and ceiling installation

The HG Power 4-inch soffit vent cover combines durable ABS construction with a built-in screen mesh to deliver efficient, pest-free ventilation. Lightweight and easy to install on walls or ceilings, its adjustable panel lets you customize airflow for healthier, fresher indoor environments in bathrooms, kitchens, garages, and more.

Specifications

ASIN	B078RMSBRB
Automotive Fit Type	Universal Fit
Best Sellers Rank	#7,651 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Soffit Vents
Brand Name	HG Power
Color	White
Compatible with Vehicle Type	Bike, Car, Truck
Customer Reviews	4.6 4.6 out of 5 stars (2,208)
Installation Type	Bolt-On
Item Weight	0.11 Kilograms
Manufacturer	HG POWER
Manufacturer Part Number	USPI022
Manufacturer Warranty Description	1 Year
Material Type	Acrylonitrile Butadiene Styrene
Model Number	USPI022
UPC	767550224002
Unit Count	1.0 Count

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