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IMPERIAL 8.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R

Name: IMPERIAL 8.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R
Brand: IMPERIAL
SKU: 50401802
Price: 68.98 USD
Availability: InStock
Rating: 4.7 (419 reviews)

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4.7

419

Diameter (Inches): 8.0

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This Imperial Duct Insulation Sleeve works as an energy-efficient insulation blanket suitable for heating, ventilation, and air conditioning systems. Specifically designed to insulate rigid or semi-rigid round ducts, it is an excellent method for reducing heat or cool loss and condensation build-up. The sleeve is made of a thick fiberglass insulation blanket enclosed in a strong, fiberglass-reinforced silver metalized outer jacket. The insulation sleeve measures 8-in x 25-ft, meets UL 181 standards for Class 1 Air Duct, and features an energy-efficient insulation R-value of 6.0. Check your local building codes prior to installation.

Insulation blanket designed for insulating rigid or semi-rigid round ducts
Suitable for use with heating, ventilation, and air conditioning systems
Helps reduce heat or cool loss and condensation for energy efficiency
Meets UL 181 Class 1 Air Duct standards
Thick fiberglass insulation blanket
Heavy-duty silver metalized outer jacket
Fiberglass insulation R-value: 6.0

General
Color/Finish Family	Silver	Insulation Material	Fiberglass
Type	Flexible	Duct Material	Polyester

Dimensions
Diameter (Inches)	8	Maximum Length (Feet)	25

Features
Insulated	Yes

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	UL safety listing
R Value	6

Warranty
Warranty	1-year limited

Miscellaneous
UNSPSC	72151200

Check out the Best Selling Flexible Duct on Lowes.com

Review

4.7 out of 5

419 Reviews

91% Recommend this product

Ratings may include incentivized customer reviews.

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+ 2

What Customers Are Saying

Customers overwhelmingly praise this flexible insulated duct for exceptional thermal insulation that reduces condensation and cuts heat transfer dramatically, leading to measurable energy savings. The standout feature is ease of installation—reviewers consistently note it cuts and trims easily, slides over existing ducts, and routes through tight spaces without difficulty. Many report it performs reliably as a replacement for aging ductwork across attic runs, bathroom vents, and whole-home HVAC retrofits. A few mention the outer shell is thin or that clamps are not included, though most still consider it an excellent solution.

Customer review summary generated by AI, including incentivized reviews.

419 Customer Reviews

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Easy Install and Adequate Installation Thickness

First t8me we've had to purchase an a/c duct. Insulation was a good thickness, easy to install and fair price.

TripinTrish TXOctober 2, 2026
From 12.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R Verified Purchaser

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Flexible product

Would Recommend

I stalled in a crawl space, working with the material was easy. Trimming to size and working with the jacket over joints went well. Just have to be careful of the wire in the inner tube when cutting to size.

NickSeptember 25, 2026
From 6.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R Verified Purchaser

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I’m very satisfied I bought this

Me69BSSeptember 20, 2026
From 6.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R Verified Purchaser

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Pretty good

Seems to be pretty good. The thin plastic is surprisingly strong for being so thin. The only issue I have with it is that it can be difficult to slip over the duct boot ends, especially if located in a tough to reach spot,

SelfSeptember 19, 2026
From 6.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R Verified Purchaser

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Got the job done ✔️

Great product,.

HeckSeptember 10, 2026
Verified Purchaser

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COMPARE PRODUCTS

		Name	Current Item IMPERIAL8.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R
		Ratings	419
		CA Residents: Prop 65 Warning(s)
		UNSPSC	72151200
		Diameter (Inches)	8
IMPERIAL8.0-in x 25.0-ft Polyester Insulated Flexible Duct 6.0 - R	IMPERIAL8.0-in x 25.0-ft Polyester Insulated Flexible Duct 8.0 - R	IMPERIAL6.0-in x 25.0-ft Polyester Insulated Flexible Duct 8.0 - R	IMPERIAL12.0-in x 25.0-ft Polyester Insulated Flexible Duct 4.2 - R	IMPERIAL12.0-in x 25.0-ft Polyester Insulated Flexible Duct 8.0 - R	IMPERIAL7-in x 25.0-ft Polyester Insulated Flexible Duct 8 - R	IMPERIAL10.0-in x 25.0-ft Polyester Insulated Flexible Duct 8.0 - R	IMPERIAL14-in x 25.0-ft Polyester Insulated Flexible Duct 8 - R	IMPERIAL R8.0 25 ft. L X 9 in. D Silver Poly Duct
196	103	103	26	103	103	103	103

72151200	72151200	72151200	72151200	72151200	72151200	72151200	72151200	72151200
8	8	6	12	12	7	10	14