--- product_id: 90337636 title: "Formline Supply Quiet 4 inch Inline Duct Fan with Variable Speed Controller - 190 CFM Exhaust Blower Provides a Durable Low Noise Solution for Grow Tent Ventilation" brand: "formline supply" price: "₨20530" currency: LKR in_stock: false reviews_count: 8 url: https://www.desertcart.lk/products/90337636-formline-supply-quiet-4-inch-inline-duct-fan-with-variable store_origin: LK region: Sri Lanka --- # Formline Supply Quiet 4 inch Inline Duct Fan with Variable Speed Controller - 190 CFM Exhaust Blower Provides a Durable Low Noise Solution for Grow Tent Ventilation **Brand:** formline supply **Price:** ₨20530 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Formline Supply Quiet 4 inch Inline Duct Fan with Variable Speed Controller - 190 CFM Exhaust Blower Provides a Durable Low Noise Solution for Grow Tent Ventilation by formline supply - **How much does it cost?** ₨20530 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/90337636-formline-supply-quiet-4-inch-inline-duct-fan-with-variable) ## Best For - formline supply enthusiasts ## Why This Product - Trusted formline supply brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Long life with low energy consumption -2 YEAR WARRANTY - CE LISTED -Speed 2300 RPM, Current 0.8A, Air Flow 190 CFM, Voltage 110/120V, Power 59W Review: Good quality quiet fan - This fan works great, I bought two for a grow tent set up. One fan is used with a charcoal filter, and another for the air intake. They work as described, are strong, and quiet. I read mixed reviews of the fan being noisy, the fan is pretty quiet in my opinion. But there is a very slight humming noise heard in other rooms while runnning. The fan does not feel or look cheap and is made with quality pieces. I would highly recommend. Review: Bathroom Exhaust Fan. - Item arrive on time. Installation was fairly easy. The speed switch works great. I installed this fan as a bathroom exhaust fan. I installed in attic with a 6" flex connection. After everything was all set and done I was able to get around 320 cfm out of end discharge. Lowered Speed to about 200 cfm. It is very quiet. ## Features - HELP MAINTAIN THE PERFECT PLANT ENVIRONMENT - Help simulate the fresh breeze plants enjoy in the wild within your grow tent. This grow tent exhaust or air intake vent system can create an environment where your flowers can thrive. Reduce the chances of root issue or pests due to excessive moisture and heat. - EFFICIENT DESIGN - Formline fans are Quiet, Long lasting, have low energy consumption. CE Listed - MULTIPURPOSE USE - In addition to Grow Rooms and Garden Tents, this 4 inch fan works great as an attic fan, bathroom fan, and commercial cooling - 100% SATISFACTION GUARANTEE - All Formline Supply purchases are backed by our 100% Satisfaction guarantee. We ensure that you will be fully satisfied with your product or you will receive your money back. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B075J9N916 | | Air Flow Capacity | 190 Cubic Feet Per Minute | | Blade Material | Plastic | | Brand | Formline Supply | | Brand Name | Formline Supply | | Color | Black | | Control Method | Touch | | Controller Type | Button Control | | Customer Reviews | 4.6 out of 5 stars 32 Reviews | | Electric Fan Design | Blower | | Electric fan design | Blower | | Included Components | Cord | | Indoor Outdoor Usage | Indoor | | Is Product Cordless | No | | Manufacturer | Formline Supply | | Material | Plastic | | Model Number | 045922794514 | | Mounting Type | Duct Mount | | Number of Power Levels | 2 | | Power Source | Corded Electric | | Recommended Uses For Product | Cooling | | Room Type | Bathroom | | Size | 4 Inch | | Special Feature | Quiet Operation, Durable Construction, CE Certified | | Special Features | Quiet Operation, Durable Construction, CE Certified | | Specification Met | CE | | Speed | 2300 RPM | | Standby Power Shutoff | High Efficiency | | UPC | 045922794514 | | Voltage | 120 Volts | | Wattage | 59 watts | ## Images ![Formline Supply Quiet 4 inch Inline Duct Fan with Variable Speed Controller - 190 CFM Exhaust Blower Provides a Durable Low Noise Solution for Grow Tent Ventilation - Image 1](https://m.media-amazon.com/images/I/717D4LqB6iL.jpg) ![Formline Supply Quiet 4 inch Inline Duct Fan with Variable Speed Controller - 190 CFM Exhaust Blower Provides a Durable Low Noise Solution for Grow Tent Ventilation - Image 2](https://m.media-amazon.com/images/I/61-H9QW9v1L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality quiet fan *by J***O on June 24, 2018* This fan works great, I bought two for a grow tent set up. One fan is used with a charcoal filter, and another for the air intake. They work as described, are strong, and quiet. I read mixed reviews of the fan being noisy, the fan is pretty quiet in my opinion. But there is a very slight humming noise heard in other rooms while runnning. The fan does not feel or look cheap and is made with quality pieces. I would highly recommend. ### ⭐⭐⭐⭐⭐ Bathroom Exhaust Fan. *by J***R on March 1, 2018* Item arrive on time. Installation was fairly easy. The speed switch works great. I installed this fan as a bathroom exhaust fan. I installed in attic with a 6" flex connection. After everything was all set and done I was able to get around 320 cfm out of end discharge. Lowered Speed to about 200 cfm. It is very quiet. ### ⭐⭐⭐⭐⭐ Too big for my 48x48x80 tent *by M***Y on September 4, 2018* The fan works well but the cfm for this 6-inch fan is a little too high for my 48x48x80 tent. Even with two 6-inch and two 4-inch vents open, and the fan on lowest speed setting, it sucks in the sides of the tent signicantly. I probably could have bought a 4-inch fan since I use LED lights which don't give off a lot of heat. I use a maximum of four 600 watt lamps, depending on how many seed trays I'm growing. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.lk/products/90337636-formline-supply-quiet-4-inch-inline-duct-fan-with-variable](https://www.desertcart.lk/products/90337636-formline-supply-quiet-4-inch-inline-duct-fan-with-variable) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-07-11*