Name: IMPERIAL 3.0-in x 20.0-ft Foil Flexible Duct
Brand: IMPERIAL
SKU: 4565894
Price: 30.48 USD
Availability: InStock
Rating: 4.5 (222 reviews)

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This easy-to-use Imperial 3-in x 20-ft Flexible Aluminum Foil Air Connector is ideal for bath fan and other general purpose venting applications. It's made from tear- and puncture-resistant 2-ply aluminum foil reinforced with a corrosion-resistant wire helix. This product has been rated as a Class 1 Air Connector under UL 181/ULC-S110 for installation lengths of 14-ft or less. It is not suitable for dryer venting.

Use with bathroom fans and other general purpose venting applications
Tear- and puncture-resistant aluminum foil reinforced with corrosion-resistant wire helix
UL 181/ULC-S110 Class 1 Air Connector
Flexible foil design is easy to install
For installation in lengths not over 14-ft
Suitable for use with heating, ventilation, and air conditioning systems
Not suitable for dryer venting
Maximum operating temperature of 250°F

General
Color/Finish Family	Silver	Insulation Material	N/A (not insulated)
Type	Flexible	Duct Material	Foil

Dimensions
Diameter (Inches)	3	Maximum Length (Feet)	20

Features
Insulated	No

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	UL safety listing
R Value	0

Warranty
Warranty	1-year limited

Miscellaneous
UNSPSC	72151200

Check out the Best Selling Flexible Duct on Lowes.com

Review

4.5 out of 5

222 Reviews

91% Recommend this product

Ratings may include incentivized customer reviews.

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What Customers Are Saying

Customers overwhelmingly praise this flexible duct for its ease of installation, adaptability, and durability across diverse applications. The ribbed design bends easily around obstacles, making it ideal for bathroom exhaust fans, attic venting, and tight spaces where rigid ducting won't fit. Reviewers consistently describe it as sturdy, reliable, and higher quality than expected. Most find it straightforward to install and manipulate. However, several customers explicitly warn against using it for dryer venting due to fire hazard risks and lint buildup concerns. Despite these cautions, the majority consider it an excellent, versatile solution for non-linear venting needs.

Customer review summary generated by AI, including incentivized reviews.

222 Customer Reviews

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Venting

Bought this on the advice of the crew installing my new dryer.....which allowed them to properly install the dryer.

TerrySeptember 30, 2026
From 4.0-in x 20.0-ft Foil Flexible Duct Verified Purchaser

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Would Recommend

Used along with the magnetic dryer vent.

PattyPSeptember 7, 2026
Verified Purchaser

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Easy to install

Would Recommend

My husband had this installed in just a few minutes! The longest time was spent moving the dryer and getting ready to install!

cjb03September 6, 2026
From 4.0-in x 20.0-ft Foil Flexible Duct Verified Purchaser

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Incredibly flimsy quality for price

Would Not Recommend

Material is very thin, almost exactly like regular aluminum foil. If it catches on anything, it rips immediately. There are no included clamps, so that's another $4-6 per clamp. Paid $26 for this and it's maybe worth $10. Total rip off.

ushlowSeptember 2, 2026
From 4.0-in x 20.0-ft Foil Flexible Duct Verified Purchaser

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		Name	Current Item IMPERIAL3.0-in x 20.0-ft Foil Flexible Duct
		Ratings	222
		Diameter (Inches)	3
		Type	Flexible
		Insulated
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Flexible	Flexible	Flexible	Flexible	Flexible	Flexible	Flexible	Flexible	Semi-rigid