Will the openings stretch overtop of a connector?

The diameter of the spring coil is 3 in, and the PVC and foil liner is a little bit inside of this. I was able to stretch the liner and get the connector inside, but it might be worth going with the next size up.

Is this UL approved for dryer venting?

No. I wouldn’t use this. Higher temperature applications require a different flex usually all aluminum for dryer venting because of the moisture levels being exhausted.

What is the inner diameter ? will this fit to 3" pvc ? i am trying to use it for the intake and outtake of tankless water heater

Inner diameter is 75mm, fit to 3"

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Hon&Guan 3" x 8FT Insulated Duct with Aluminum Foil, Flexible Dryer Vent Hose for HVAC Ventilation and Duct Fan Systems, 2 Clamps Include

Product ID: 597032300

Details

Brand
Hon&Guan
Colour
Black
Material
Polyvinyl
Maximum pressure
5 Bars
Product dimensions
2.44L x 0.08W

🔇50% noise reduction

🖤lightproof black PVC layer

🛡️3-layer durable construction

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1597156₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Silence, Strength & Style — The Ultimate 3" Flexible Duct

FLEXIBLE FIT - Easily installs in tight spaces, adapting to any HVAC or dryer setup
BUILT TO LAST - 3-layer aluminum foil, PET, and steel wire helix resist rips and pinholes
LIGHTPROOF DESIGN - Thick black PVC layer blocks all light leaks, perfect for grow rooms
WHISPER QUIET VENTING - Cut fan noise by up to 50% for a peaceful environment
VERSATILE AIRFLOW SOLUTION - Ideal for kitchens, bathrooms, grow tents, and more—universal compatibility

The Hon&Guan 3" x 8FT Insulated Flexible Duct combines advanced 3-layer construction with a lightproof black PVC exterior and noise-silencing technology to deliver durable, quiet, and efficient ventilation. Designed for easy installation in tight spaces, it supports HVAC, dryer vents, and grow room applications, ensuring optimal airflow and long-lasting performance with included clamps for secure fitting.

Specifications

ASIN	B09WCY715H
Best Sellers Rank	#5,511 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #156 in Registers, Grilles & Vents
Brand	Hon&Guan
Brand Name	Hon&Guan
Color	Black
Colour	Black
Customer Reviews	4.3 out of 5 stars 7,664 Reviews
Included Components	2PCS Clamps, 3*8FT Duct Hose
Item Dimensions L x W	2.44L x 0.08W Meters
Item Length	96 Inches
Item Type Name	Duct Hose
Manufacturer	Hon&Guan
Material	Polyvinyl Chloride (PVC)
Material Type	Polyvinyl Chloride (PVC)
Maximum Pressure	5 Bars
Maximum pressure	5 Bars
Nominal Wall Thickness	0.07
Nominal wall thickness	0.07
Outside Diameter	3 Inches
Product dimensions	2.44L x 0.08W Meters
Unit Count	1.0 Count

Reviews

A**I

Good product

21.10.2025

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