will this work for a bathroom fan duct that I need to decrease from 4" - 3" to fit in an eave vent? some people say that the reducer is the same size

It may work in an eave vent. I used it right off the ceiling vent fan. The exhaust duct on the old fan was 3 inch and the fan vent opening on the new fan was 4 inch. Aluminum taped inside and outside, then double wrapped the ducting. As strong as the reducer is, it would be difficult to reduce the length

What's the temperature rating on this reducer?

Its galvanized steel! Unless you r looking for industrial stuff, the temp rate must be way above what you need; if you looking for industrial, steer clear!

Can you clamp this to a 4 inch dryer vent? not the hose side

You need a duct splitter probably.. I don't really know what you're trying to do

Will this work for a portable electric dryer?

I used it to vent a free-standing a/c unit. I did not have a window and drilled a hole in the wall and used this to vent it. I would think it would work for your dryer.

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Repa Market 8" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods

Repa Market 8" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods

Product ID: 430313868

📏Precise 3.89" to 7.83" fit

⚙️Dual reducer/increaser function

🛡️Heavy-duty galvanized steel

10560 som

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Upgrade Your Airflow Game with Precision & Durability!

PERFECT FIT EVERY TIME - Engineered with exact outer diameters (3.89" to 7.83") for seamless duct transitions—no leaks, no fuss.
VERSATILE AIRFLOW MASTER - Functions as both reducer and increaser, optimizing airflow for HVAC, dryer vents, and exhaust fans.
DIY FRIENDLY INSTALLATION - Push-fit design ensures quick, hassle-free setup for pros and weekend warriors alike.
BUILT TO BRAVE THE ELEMENTS - Crafted from rust-resistant galvanized steel to withstand moisture and corrosion in any environment.
UNIVERSAL VENTILATION SOLUTION - Ideal for everything from kitchen hoods to bathroom fans—upgrade your airflow game effortlessly.

This 8" to 4" galvanized steel duct reducer/increaser offers precise sizing and robust corrosion resistance, ensuring a secure, leak-free connection for HVAC, dryer vents, and exhaust systems. Its dual functionality and easy push-fit installation make it a must-have for professional and DIY ventilation projects.

Specifications

ASIN	B09PLLPR73
Best Sellers Rank	#80,984 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #147 in HVAC Ducting
Brand	Repa Market
Brand Name	Repa Market
Color	Silver
Connector Type	Reducer
Customer Reviews	4.6 out of 5 stars 1,044 Reviews
Exterior Finish	Alloy Steel
Global Trade Identification Number	04751038502429
Included Components	Galvanized Steel Reducer/Increaser
Item Dimensions	7.99 x 5.35 x 7.99 inches
Item dimensions L x W x H	7.99 x 5.35 x 7.99 inches
Manufacturer	Repa Market
Material	Metal
Material Type	Metal
Number of Pieces	1
Size	4 to 8 Inch / 100 to 200 mm
Thread Size	6 inch
Thread Type	NPT
Unit Count	1 Count

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10560 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kyrgyzstan.

Secure transaction

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