Is this safe to vent a portable ac? ac's can get really hot.

I've never owned a portable AC. If there is a 4" circle shaped vent hole on the portable AC, it should tolerate the heat. Stationary ACs condensate water, there is no vent hole.

anyone use this for garage auto exhaust tube?

I am currently using this to exhaust the air in my wood shop

Is this suitable for marine use?

No paperwork came with it indicating whether it is USCG compliant (if there is such a requirement). If you want to use it as a duct for a bilge blower, I would say go ahead and use it. If you are concerned about fire retardancy, I suggest you contact the seller first.

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AC Infinity Flexible 4" Aluminum Duct Heavy Duty 4-Layer Protection for Heating, Cooling, Ventilation and Exhaust - 8 Feet Long

AC Infinity Flexible 4" Aluminum Duct Heavy Duty 4-Layer Protection for Heating, Cooling, Ventilation and Exhaust - 8 Feet Long

Product ID: 727848169

Details

Brand
AC Infinity
Color
Black
Item Length
8 Feet
Item Weight
0.48 Kilograms
Manufacturer
AC Infinity
Material
Aluminum PVC

🔄Flexible steel wire spiral for tight spaces

✂️Customizable 8ft length, easy to cut

🛡️4-layer heavy-duty leak & tear resistance

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1165967 som

Duties & taxes included

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌀 Elevate your airflow game with flexible, heavy-duty ducting that adapts to your space and style.

COMPLETE INSTALLATION KIT - Includes 2 stainless steel 4" duct clamps for secure, hassle-free mounting right out of the box.
FLEXIBILITY MEETS FUNCTION - Internal steel wire spiral allows effortless bending and installation in hard-to-reach or confined spaces.
TAILORED FIT FOR EVERY SETUP - Easily cut the 8-foot duct to your exact length, ensuring a perfect fit for any HVAC, ventilation, or cooling project.
VERSATILE VENTILATION SOLUTION - Ideal for HVAC, hydroponics, grow tents, dryers, attics, and AV equipment cooling—engineered for professional-grade airflow.
BUILT TO LAST DESIGNED TO PERFORM - Durable 4-layer aluminum & PVC construction resists leaks, rips, and tears for long-term reliability.

The AC Infinity Flexible 4" Aluminum Duct features a robust 4-layer design combining fire-resistant aluminum and protective PVC for superior durability and leak prevention. Its steel wire spiral core offers exceptional flexibility, making installation in tight or awkward spaces effortless. At 8 feet long and easily customizable by cutting, it suits a wide range of ventilation needs from HVAC systems to hydroponic grow rooms. Included stainless steel clamps ensure a secure fit, making this duct a trusted choice for professionals seeking reliable, adaptable airflow solutions.

Specifications

ASIN	B07WRDTX4C
Amazon Bestseller	#167,959 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #367 in Industrial Duct Hoses
Brand Name	AC Infinity
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (11,015)
Global Trade Identification Number	00819137021020
Item Length	8 Feet
Item Weight	0.48 Kilograms
Manufacturer	AC Infinity
Material Type	Aluminum, PVC, Stainless Steel
Outside Diameter	4 Inches
UPC	819137021020
Unit Count	1.0 Count

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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