The Best flex duct cfm ratings of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best flex duct cfm ratings of 2022. Check our ranking below.

2,829 Reviews Scanned

Rank No. #1

AC Infinity Flexible 8-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust

Designed for ventilation applications including HVAC, dryer, grow rooms and tents.
Four-layer design makes it more durable and resistant to leaks, tears, and cuts.
Steel-wire spiral structure is flexible and easy-to-install in hard to reach places.
Constructed of aluminum and thermoplastic; tube can be shortened for various applications.
Ducting Size: 8” | Length: 8 feet | Includes two stainless steel 8" duct clamps

Rank No. #2

Rubber-Cal "HVAC Insulated-Flex" Ducting Ventilation Duct Hose, 12-Inch by 25-Feet

Compressible and easy to transport
Extremely cost effective insulated duct
Provides acoustical as well as thermal insulation
Insulation maintains temperature of air inside hose
Ideal for use for permanent and mobile air condition units

Rank No. #3

OdorStop Flexible Duct in Various Sizes and Lengths with Connecting Belt, 8-in by 25-ft

🛑8 inches by 25 feet PVC flexible duct
🛑Retracts into self-contained carry bag
🛑Temperature resistant to 180°F, positive or negative pressure
🛑Professional grade PVC over steel spring wire, non-collapsible
🛑Connects multiple ducts without connecting collar, meets ASTM 227

Rank No. #4

AC Infinity Flexible 6-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust

Designed for ventilation applications including HVAC, dryer, grow rooms and tents.
Four layer design makes it more durable and resistant to leaks, tears, and cuts.
Steel-wire spiral structure is flexible and easy-to-install in hard to reach places.
Constructed of Aluminum and thermoplastic, tube can be shortened for various applications.
Ducting Size: 6” | Length: 25 feet | Includes two stainless steel 6" duct clamps

Rank No. #5

TerraBloom 6 Inch Aluminum Flex Duct - 8 FT Long, Flexible Ducting with 2 Clamps, 3 Layer HVAC Ventilation Air Hose - Great for Dryer, Grow Tent, Green Houses, Household HVAC Venting

6" by 8' DUCTING WITH FLEXIBLE SHAPE: This flexible duct is 6 Inches in Diameter and 8 Feet Long. It comes with 2 Duct Clamps Incuded in The Box
3-LAYER TOUGH: Keep your ventilation system free of rips and pin holes. This ducting is built with a layer of Heat Reflective Fire-Retardant Aluminum, Covered with PET for additional endurance and Steel Wire Helix to preserve the Ducts shape
FLEXIBLE AND EASY TO USE: Our 6 Inch Duct is super flexible and easy to install, it will slide right on your Duct Fan, Vent Exhaust, Carbon Filter or Light Reflector. We include a pair of 6 Inch Clamps to make the installation a breeze
6" DIAMETER WITH ADJUSTABLE LENGTH: This Ventilation Duct is 6 Inches in diameter and comes in one 8 Feet Long Piece, which can be cut into as many pieces as you need using a wire cutter and a paper knife
VARIETY OF APPLICATIONS: Our Ducting Is suitable for any Heating Ventilation & Air Conditioning (HVAC) Purposes. It will move and deliver air in Kitchens (cooking exhaust), Green Houses and Grow Rooms (Air Circulation, Intake, Exhaust and Light Fixture Cooling), Bathrooms (Smell and Moisture Exhaust), Dryer Rooms, Grow Tents and other applications you have in mind

Rank No. #6

Amagabeli 6in Aluminum Foil Duct Hose Flex Grow Tent Room Ventilation Cooling System 25ft Air Intake Helix Pipe Exhaust Fan Filter CFM Clothe Dryer Vent Hose with 2 Tension Clamps HAVC Heat Duct

Non-insulated Ducting: 6" diameter x 25' feet long air duct, made of thick and durable aluminum, fire-resistance coating foil vent ducting with 2 metal clamps, the 6 inch flexible clamps fits fans and vents, simple to keep clean, great for using a diversion vent at temperature range from 0 to 185+ F.
6x25 Spiral Ducting: Wide variety of applications in ductwork system, heat filters, medical rooms, air conditioner, allergy room m, bathroom, greenhouse, tent grow room, air tight system and stove vent, circulating the atmosphere, air-conditioning the flow, removing heat from an enclosure, distributes CO2, increases temperature & humidity levels and etc.durable and resistant to leaks, tears, and cuts.durable and resistant to leaks, tears, and cuts.durable and resistant to leaks, tears, and cuts.
Tight & Flexible: Ductwork heavy duty helically shaped and internally crimped corrosion resistant wire helix interlocking steel strips to form an air tight and leak proof system, flexible to expand and stay strong as a clothes dryer transition duct, ventilation tent air blower, flange system cleaner, etc.
Easy to Install: To cut and poke a hole in the duct with a screwdriver and tear around it with finger. Then use side cutters to clip the support wire.durable and resistant to leaks, tears, and cuts.
CUSTOMER CARE: We offer premium products for you while exceeding highest industry standards and offer thoughtful and considerate customer care.

Rank No. #7

AC Infinity Flexible 12-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust

Designed for ventilation applications including HVAC, dryer, grow rooms and tents.
Four layer design makes it more durable and resistant to leaks, tears, and cuts.
Steel-wire spiral structure is flexible and easy-to-install in hard to reach places.
Constructed of Aluminum and thermoplastic, tube can be shortened for various applications.
Ducting Size: 12” | Length: 25 feet | Includes two stainless steel 12" duct clamps

Rank No. #8

TerraBloom 8 Inch Aluminum Flex Duct - 8 FT Long, Flexible Ducting with 2 Clamps, 3 Layer HVAC Ventilation Air Hose - Great for Dryer, Grow Tent, Green Houses, Household HVAC Venting

This 8-inch flexible air duct reaches 8 feet in length when fully extended. It fits snugly over the 8-in duct flanges.
This 8" flex ducting is easy to install with a pair of included duct clamps and works for various HVAC, dryer, indoor growing, odorous air, humidity, and smoke exhaust applications.
The ducting is constructed with two layers of aluminum foil, a shape-forming steel wire helix in the middle, and an overcoat of a transparent film for extra protection.
This is a lightproof, non-insulated air duct with an R-value of zero. It will dissipate heat throughout its surface.
This duct comes as one 8-ft long piece when fully extended, It can be shortened or split into smaller parts of the desired length using a pair of metal snips.

Rank No. #9

Flexible Duct Friction Loss Calculator/Flex Duct Calculator Tool # 34-3453-01

Double Sided with Flex Duct Calculator
Flexible Duct Friction Loss Calculator
As specified in the Air Diffusion Counci's Flexible Performance & Installation Standards Green Book
Replaces / Supersedes: Flex Duct Flexible Duct Calculator 34-3453-01 34345301 Flexible Duct Friction Loss Calculator

Rank No. #10

5" Inch Flexible Aluminum Ducting Hose Insulated R-4.2 Air Duct Pipe for for Heavy Duty HVAC & Exhaust Ductwork Insulation - 25' Feet Long

High Quality: Aluminum Housing On the Outside and on the Inside For The Best Insulation Value
Air-tight Inner Core Decreases The Pressure Loss and Provides A More Hygienic Environment- High Energy Efficient / No fiberglass erosion into air stream.
Thick Blanket of Fiberglass Insulation: Which Gives You A R-Value of 4.2
Tough Reinforced Metallized Polyester Jacket - Tear and puncture resistant - Air-tight Inner Core - No fiberglass erosion into air stream.
Designed To withhold Bends And Sharp Turns Without Kinking

Last update on 2023-03-09 / Affiliate links / Images from Amazon Product Advertising API

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FAQ:

Q: Is flex duct bad for air flow?

A: Sagging flex duct is bad for air flow. We all know it. We all talk about it. It turns out there’s research data to prove it, too. Texas A&M did a study a few years ago to look at the pressure drop that occurs for different levels of compression. If you’re not familiar with this study, the results may astound you.

Q: What is the life span of flex duct?

A: What is the life span of flex duct in a very hot attic in the desert southwest…. Ducks are not as long-lived as geese. The average life span of a domestic duck is 10 years or less. As a general rule, the larger breeds of duck have the shortest life spans. Seldom do they live beyond five to seven years of age.

Q: What size duct for 1200 CFM?

A: A 901 to 1200 CFM fan requires an 8-inch minimum, and a 10- to 12-inch duct is recommended. At 1200 CFM and above, the duct size will depend on the type of fan motor and the length of the duct run, but it should never be smaller than 10 inches in diameter.

Q: What is duct size per CFM?

A: The duct size is dependent on the CFM that you will be supplying that room. CFM stands for cubic feet per minute. If a room is supplied with 100 CFM, that means there will be 100 cubic feet of air dispensed into that room each minute.