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.
2,723 Reviews Scanned
- Perfect Connector: This ducting is primarily used with duct fan systems in various air circulation and ventilation projects to move and transport air, increasing airflow and easing connections between spaces; It's compatible with front-mounted and top-loading dryers/fans
- Premium Material: Made of premium aluminum, it is resistant to high-temperature and corrosion-resistant, being able to serve for a long time; The stainless steel clamps are rustproof, corrosion-resistant, and heavy-duty, ensuring a seamless junction
- Multi-Layer Protection: It features multi-layer protection, making it more durable and resistant to leaks than single-layer ones; The internal and outer layers are made of heavy-duty aluminum foil that is fire/flame-retardant; Its middle layer adopts PET thermoplastic that protects the ducting from cuts and tears, all while stopping leakage
- Flexible and Convenient: Thanks to the built-in steel wire, the length and shape of this ducting is flexible to change for fitting exhaust fan blower or inline fan; Being portable and lightweight, it can be installed at any place; Comes with 2 duct clamps in the same duct opening size for easy setup and securer connection
- Abundant Applications: Suitable for both commercial and residential air duct solutions; Widely used in HVAC applications, bathroom venting, stove exhaust, dryer ventilation, kitchen cooking exhaust, planting room, or warmhouse air circulation, etc.; Also used to cool AV equipment rooms, closets, racks, and cabinets
- 3 Inch Vent Hose Size & Material: 3 inches (diameter) x 16 feet (length) when fully extended, flexible ventilation ducting made of aluminum foil and steel wire helix to preserve the shape.
- Thermal Endurance: 3 inch duct hose with a good thermal insulation performance, works well with your portable ac device, Temperature endurance range from -4 ~ 176°F.(-20℃ ~ 80℃)
- Easy Installation: 2 pairs of 3 inch metal clamps made from stainless steel. Flexible length for exhaust fan blower / inline fan.
- Fire Proof Coating: Flexible ventilation ducting made from high-quality flame-retardant aluminum and built-in corrosion-resistant wire helix for reinforcement and lasting performance.
- Wide Applications: Air Duct is suitable for HVAC system. 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 etc. Thick layer Aluminum on this ducting prevents gas and light leaks.
- LIGHTPROOF DUCTING - We made this aluminum 6 inch duct with your Grow Room needs in mind. Thick layer of Black PVC on this ducting prevents light leaks. Works with exhaust and intake fans, carbon filters and hooded lights which are 6" in diameter
- 4 LAYER PROTECTION- Our 6 inch flexible duct Keeps your ventilation system free of rips, pin holes and resistant to leaks. Under the White PVC layer our ducting is built with 2 layers of Aluminum Foil With a layer of PET and Steel Wire Helix to preserve the shape
- FLEXIBLE & EASY TO USE- TerraBloom 6 inch duct hose is super flexible and easy to install. It will slide right on your Duct Fan, Vent Exhaust, Carbon Filter or Light Reflector. This HVAC ducting includes a pair of 6 Inch Clamps to make the installation a breeze
- 6" DIAMETER WITH ADJUSTABLE LENGTH- Our 6 inch air duct comes in one 25 Feet Long Piece, which can be cut into as many pieces as you need using a wire cutter and a paper knife
- APPLICATIONS - TerraBloom 6 inch insulated 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 Tent ducting and other applications you have in mind
- HOSE + 2 CLAMPS: The dryer vent hose is made by high-quality aluminum (High Temperature Resistant & Corrosion Resistant & Long Lasting); The Clamps are made by stainless steel (Rustproof & Corrosion Resistant & Heavy Duty).
- ADVANCED THREE LAYER : Under the PVC layer the dryer duct hose is built with 2 layers of aluminum foil. A layer of durable PET and steel wire helix to preserve the shape, keep your ventilation system free of rips and pin holes.
- DUCTING PARAMETERS : 4" in diameter, This dryer duct is 10 feet long when fully extended, and the ducting can bend freely. Thermal endurance ranges from -22 to 260 F (-30 to 107 C).
- EASY TO INSTALL : Flexible and simple to Install the dryer vent hose. The dryer duct comes with two clamps to fixed the air ducting.Simple, convenient and durable.
- WIDELY USED: The flexible dryer vent hose suits HVAC system. 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 etc.
- LIGHTPROOF DUCTING - We made this aluminum 6 inch duct with your Grow Room needs in mind. Thick layer of Black PVC on this ducting prevents light leaks. Works with exhaust and intake fans, carbon filters and hooded lights which are 6" in diameter
- 4 LAYER PROTECTION- Our 6 inch flexible duct Keeps your ventilation system free of rips, pin holes and resistant to leaks. Under the White PVC layer our ducting is built with 2 layers of Aluminum Foil With a layer of PET and Steel Wire Helix to preserve the shape
- FLEXIBLE & EASY TO USE- TerraBloom 6 inch duct hose is super flexible and easy to install. It will slide right on your Duct Fan, Vent Exhaust, Carbon Filter or Light Reflector. This HVAC ducting includes a pair of 6 Inch Clamps to make the installation a breeze
- 6" DIAMETER WITH ADJUSTABLE LENGTH- Our 6 inch air duct comes in one 25 Feet Long Piece, which can be cut into as many pieces as you need using a wire cutter and a paper knife
- APPLICATIONS - TerraBloom 6 inch insulated 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 Tent ducting and other applications you have in mind
- High Quality - Aluminum housing on the outside and on the inside for the best insulation value
- Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8.1
- Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream
- Design – Designed to withstand bends and sharp turns without kinking. Tough reinforced metallized polyester jacket - tear and puncture resistant
- High Quality - Aluminum housing on the outside and on the inside for the best insulation value
- Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream
- Design – Designed to withstand bends and sharp turns without kinking. Tough reinforced metallized polyester jacket - tear and puncture resistant
- Carefully Shrink Wrapped – With cardboard backing to prevent damage in shipment
- 4 INCH x 8 FT DURABLE FLEX DUCT - We made this flexible aluminum 4" ducting with an extra layer of PVC outside for added durability. Gone is frustration from the accidental rips and tears in thin exposed aluminum ducting products. This 4" vent hose will work for your dryer, duct fan, grow tent, or whenever you need to move air from one point to another.
- 4 LAYER PROTECTION- Our 4 inch duct hose Keeps your ventilation system free of rips, pin holes and resistant to leaks. Under the White PVC layer our ducting is built with 2 layers of Aluminum Foil With a layer of PET and Steel Wire Helix to preserve the shape
- FLEXIBLE & EASY TO USE- TerraBloom 4 inch air ducting 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 4 Inch Clamps to make the installation a breeze
- 4" DIAMETER WITH ADJUSTABLE LENGTH- This 4 inch flexible duct 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
- APPLICATIONS - TerraBloom 4inch duct 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 Tent ducting and other applications you have in mind
- 【High Heat Resistance for Safe Operation】Engineered to handle temperatures from -22°F to 302°F, this flexible dryer vent hose outperforms PVC alternatives (which can emit fumes under heat). It safely manages the high temperatures from your dryer, complying with safety standards and giving you peace of mind with every use.
- 【Complete Dryer Vent Hose Kit for Easy Installation】Included 8 FT 4 inch duct hose, 2 pcs stainless steel clamps and 1 pc screwdriver, making setup a breeze. The flexible design bends freely even in tight spaces behind dryers, while the clamps secure connections quickly, no special tools needed. Cut to your desired length for a perfect fit.
- 【Optimized for Efficient Exhaust】Our dryer exhaust hose features a narrow steel wire helix and smooth inner design, reducing pressure drop and boosting airflow. This means faster, more efficient drying cycles, less noise, and minimized shaking during operation—ideal for keeping your laundry area running smoothly.
- 【Ultra-Durable Multi-Layer Construction】This 4 inch vent hose features a reinforced 3-layer design: aluminum foil, durable PET, and a steel wire helix—making it puncture-resistant and long-lasting. Unlike flimsy options, our aluminum foil hose withstands daily use without rips or pinholes, ensuring reliable performance for your dryer exhaust system.
- 【Versatile 4 Inch Vent Hose for Multiple Uses】Beyond dryers, this aluminum foil hose works seamlessly with HVAC systems, bathroom exhaust fans, grow tents, and more. Its 4-inch diameter and 8-foot length provide flexibility for various ventilation needs, making it a versatile addition to any home or workspace.
- Compressible and easy to transport
- An 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
Last update on 2025-08-20 / Affiliate links / Images from Amazon Product Advertising API
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- Specifications: How powerful they are can be measured.
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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.
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