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The Best flex duct cfm ratings of 2022 – Reviews & Buying Guide

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.

2,822 Reviews Scanned

SaleRank No. #1
Tjernlund DB-2 Duct Booster, Increases Heating and Cooling Power, 275 CFM
  • Fits 5 to 8 Inch Round Duct
  • Fits Rectangular Duct as Shallow as 3.25 Inches
  • Rated to 200F
  • Country of origin: United States
Rank No. #2
Tech Drive Bathroom fan 50 CFM, 1.0Sone DC Motor with No Attic access Needed Installation,Very Quiet Ventilation and Exhaust Fan, Ceiling Mounted Fan, White
  • Super quiet bathroom fan (1.0 sones) and Strong air movement (50CFM) for bathroom up to 50 Sq. Ft. Recommened for use in small room.
  • Easy-to-Install: No cut housing with no attic access installation and replaces most small bathroom standard fans using existing opening. it can be done entirely from the room-ceiling side – no attic access needed installation.
  • Low profile white grill cover,Housing size: 7.5in x 7.25in x 4in with 3in duct. ceiling mounting Opening: 7.6in x 7.3in.
  • The motor has a 7-second delay protection function, when the fan just starts to run.Efficient and quiet,excellent DC motor perfomance, the power is only 7W.
  • Energy Star qualified, UL and HVI certified for performance assurance.Acceptable for use over a bathtub or shower when installed in a GFCI-protected branch circuit.
SaleRank No. #3
Broan-NuTone AE110 Invent Flex Energy Star Qualified Single-Speed Ventilation Fan, 110 CFM 1.0 Sones, White
  • HIGH-QUALITY FAN: Quiet, energy efficient exhaust fan operates with 110 CFM and 1.0 Sones to help control air quality is powerful enough for rooms (including bathroom) up to 105 sq. ft. Duct Diameter 4 inch
  • EFFICIENT: Powerful ventilation reduces to quickly eliminate fogged mirrors at 110 CFM, so your vision will always be clear and your surroundings will always be comfortable
  • EASY INSTALLATION: Easy to install new/replace existing product with retrofit installations that can be done entirely from the room-side – no attic access required
  • RELIABLE PERFORMANCE: With our TrueSeal Damper Technology, InVent fans reduce air leakage by up to 50% compared to competitive models, resulting in better home performance via blower door tests and reducing cold and warm air backdrafts
  • GREAT FOR BATHROOM: UL Listed for use over tubs and showers with a GFCI circuit so you can capture the steam before it spreads throughout the room by placing your fan exactly where you need it the most
SaleRank No. #4
iPower 4 Inch 195 CFM Duct Inline Ventilation Fan Air Circulation Vent Blower for Grow Tent, Greenhouses, Basements or Kitchens, Lite
  • Multifunction: Perfect for grow tents, greenhouses, hydroponics, kitchens, bathrooms, basements, locker rooms, garage to reduce humidity, clear the air and lower temperatures in grow rooms.
  • Mini Construction: Lightweight, compact fan takes up minimal space, suitable for applications where larger fans just won’t fit.
  • High Effective: Transfer air to your target location in a quick and reasonably quiet way, with a fan speed of 2500 RPM for an air flow of 195 CFM.
  • Low Noise Design: Fitted with a flow deflector that concentrates the fan stream and cuts turbulent kinetic energy to reduce sound output to just 30 dB.
  • Easy to Install: Removable duct ends with locking tabs for easy removal and maintenance, 5.9 feet length power cord.
SaleRank No. #5
iPower 6 Inch 442 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord
  • Specifications: diameter: 6inch; Air flow: 442 CFM; Speed: 2380 RPM; Wattage: 95W; Noise level: 65dB. 110V standard household plug; Pre-wired 5 Feet power cord.
  • Durability: durable ceramic-coated can resist atmospheric corrosion from humidity. Tight and precise construction reduces wear and tear to give the element a long life. Permanently lubricated bearing that requires zero maintenance.
  • Advantages: remove heat from the system to solves air delivery problems without major system rework or expense. Suitable for industrial, household and horticulture ventilation applications for air clean and temperature control.
  • Easy to install: the installation process only takes a few minutes. Tip: The maximum ambient temperature is 176°F/80°C; Without speed controller.
  • Package including: 1 pack 6inch 442 CFM inline duct ventilation fan.
SaleRank No. #6
Broan-NuTone AER110CCTK CleanCover Bath, 110 CFM, 1.0 Sone, with Selectable CCT LED Light, Energy STARBath Fan, White
  • POWERFUL BATHROOM EXHAUST FAN: Fan operates at a powerful 110 CFM for ultimate ventilation in spaces up to 105 sq. ft. and is motor engineered for continuous operation
  • CUSTOMIZABLE LIGHTING: From a warm 3000K LED to a crisp 5000K LED, customize your space with 4 selectable light settings with the flip of a switch, automatically saving your last setting
  • ULTRA QUIET: 1.0 Sones sound rating provides whisper quiet operation and the TrueSeal Damper Technology reduces air leakage by up to 50%
  • HIGH TECH GRILLE: CleanCover grille stays cleaner longer with fewer vent slots to collect dust
  • EASY INSTALLATION: Broan Roomside Series ventilation fan fits 2" x 6" ceiling construction and easily installs from the roomside, which makes it possible to retrofit to spaces with no attic access
Rank No. #7
Panasonic FV-0511VQ1 WhisperCeiling DC Ventilation Fan, Speed Selector, SmartFlow Technology, Quiet,White
  • Installation: Features a 4-inch or 6-inch duct adaptor ideal for new construction and renovations
  • Precision Spot Ventilation: Quiet and powerful ventilation while removing moisture and pollution
  • Pick-A-Flow Speed Selector: Allows you to pick desired airflow from 50, 80, 110 CFM
  • Flexible Installation: Comes with Flex-Z Fast bracket for easy, fast and trouble-free installation
  • Energy Star Rated: Delivers powerful airflow without wasting energy
Rank No. #8
Hydrofarm ACBS6 Bug Fan Exhaust Screen, 6" Intake Shield, Black
  • Mesh bug screen catches insects of all kinds, as well as unsightly and potentially damaging mold and mildew
  • These bug shields feature washable materials, an elasticized opening and an adjustable drawstring to seal off a perfect fit
  • Use it on your fans and ducting, as it is suitable for both intake and exhaust purposes
  • Made in China
Rank No. #9
iPower GLFANXINLINE4 4 Inch 190 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord, Silver
  • Specifications: diameter: 4inch; Air flow: 190 CFM; Speed: 2460 RPM; Wattage: 74W; Noise level: 65dB. 110V standard household plug; Pre-wired 5 Feet power cord.
  • Durability: Is made of a high-quality, cold-rolled steel. The surface is treated with a plastic sealant to provide a strong resistance to corrosion. Tight and precise construction reduces wear and tear to give the element a long life
  • Advantages: remove heat from the system to solves air delivery problems without major system rework or expense. Suitable for industrial, household and horticulture ventilation applications for air clean and temperature control.
  • Easy to install: the installation process only takes a few minutes. Tip: The maximum ambient temperature is 176°F/80°C; Without speed controller.
  • Package including: 1 pack 4inch 190 CFM inline duct ventilation fan.
Rank No. #10
AC Infinity Air Carbon Filter 6" with Premium Australian Virgin Charcoal, Fit with Inline Duct Fans for Odor Control in Grow Tents, Grow Rooms, and Hydroponics Systems
  • 6” inline filter designed to block odors and chemicals from escaping grow tents and hydroponics rooms.
  • Features premium-grade Australian charcoal with greater adsorption and longer life rating.
  • Powder-coated gunmetal finish is constructed for high durability and rust resistance to high-level humidity.
  • Built with aluminum flanges and a galvanized steel mesh; includes two hanging straps and two pre-filters.
  • Duct Opening: 6” | Length: 16" | Carbon: Australian RC412 at 1200+ IAV | Thickness: 60mm

Last update on 2022-10-25 / Affiliate links / Images from Amazon Product Advertising API

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  3. Specifications: How powerful they are can be measured.
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