--- product_id: 531929416 title: "Automatic Duct Fan 100mm, Inline Fan with Differential Fan Pressure Switch, Air Vent Booster for Industrial HVAC Ducting Ventilation Exhaust Systems, 4-Inch" brand: "ac infinity" price: "€ 360.78" currency: EUR in_stock: true reviews_count: 5 category: "Ac Infinity" url: https://www.desertcart.com.cy/products/531929416-automatic-duct-fan-100mm-inline-fan-with-differential-fan-pressure store_origin: CY region: Cyprus --- # 230 CFM airflow 5-speed PWM EC motor 60 dBA ultra-quiet Automatic Duct Fan 100mm, Inline Fan with Differential Fan Pressure Switch, Air Vent Booster for Industrial HVAC Ducting Ventilation Exhaust Systems, 4-Inch **Brand:** ac infinity **Price:** € 360.78 **Availability:** βœ… In Stock ## Summary > πŸ’¨ Elevate your airflow gameβ€”smart, silent, and unstoppable! ## Quick Answers - **What is this?** Automatic Duct Fan 100mm, Inline Fan with Differential Fan Pressure Switch, Air Vent Booster for Industrial HVAC Ducting Ventilation Exhaust Systems, 4-Inch by ac infinity - **How much does it cost?** € 360.78 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/531929416-automatic-duct-fan-100mm-inline-fan-with-differential-fan-pressure) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact Powerhouse:** Boosts HVAC performance with 230 CFM airflow in a sleek 4-inch inline fan design. - β€’ **Omnidirectional Mounting:** Install vertically, horizontally, or diagonally to fit any duct layout seamlessly. - β€’ **Whisper-Quiet Efficiency:** Next-gen motor design keeps noise at a discreet 60 dBA while maximizing airflow. - β€’ **Precision Airflow Control:** Five adjustable speeds powered by advanced PWM EC motor for tailored ventilation. - β€’ **Effortless Smart Activation:** Automatically triggers with duct pressure changesβ€”no manual fuss. ## Overview The AC Infinity Automatic Duct Fan 100mm is a compact, 4-inch inline ventilation booster designed for both industrial and residential HVAC systems. Featuring a differential pressure switch for automatic activation, five PWM-controlled fan speeds, and omnidirectional mounting, it delivers up to 230 CFM airflow quietly at 60 dBA. Powered by an energy-efficient EC motor, this fan ensures precise, hassle-free airflow enhancement to optimize heating and cooling delivery. ## Description Product DescriptionAn automatic booster fan designed to improve airflow delivery in longer ductwork for more effective heating or cooling in home or industrial settings. Features a highly intuitive differential pressure switch that senses changes in your ducting to automatically operate its on/off activation. It also allows for mounting in any direction, making it possible to direct airflow vertically, horizontally, or diagonally. The inline duct fan also features five speeds powered by PWM controls that can generate precise airflow levels. This, combined with its flexibility in installation, provides total ventilation control in extended ducting and other difficult-to-reach spaces.Automatic Pressure SensingThe fan pressure switch delivers automatic activation capabilities to boost your heating or cooling on-demand, eliminating the need for manual adjustments. This is achieved by detecting pressure change in your ducting and turning it on whenever your home appliance is on. The smart sensor also allows you to omnidirectionally mount the duct fan for enhanced airflow versatility in existing HVAC systems.Quiet and Energy Efficient DesignThe automatic duct fan features a next-gen EC motor that powers quiet and energy-efficient performance. This innovative motor is controlled with PWM technology to ensure smooth performance while minimizing heat and noise levels. Its mixed flow design gives this vent booster fan a high static pressure rating to enhance airflow in HVAC applications with restricted air movement. This includes industrial settings like manufacturing and processing plants, as well as home residential settings such as bathroom ventilation and central air and heating systems. Review: Triggers reliably, relatively quiet. I'm using this as a make up air unit for my laundry room. I put the pitot tube on my dryer, while the fan is just behind a damper on an intake duct. Because of the intended use as a booster, this is programmed to shut off for a bit every five minutes to see if there is still flow with the motor off. For my use I wish there was a mode that doesn't need to shut off to sense, as the fan is on a different duct. This is still a very affordable universal make up air unit. Review: Easy to install. Automatic turn on/off via pressure sensing is great. This allows me to installed it in the attic. My pipe run up 10' wall then turn 45 degree for 5' then run to the roof for another 4' or so. I guess this was too long for the new LG dryer because if keeps throwing the d80 code. The fan was installed on a 45 degree without any problem with the flexible hose + clamps. No mode d80 code from the LG dryer and the clothes dry so much faster. ## Features - Inline duct fan for boosting airflow in ducting and vent systems to ensure heating or cooling delivery. - Automatically activates the ventilation fan by detecting pressure change to eliminate manual adjusting. - Differential pressure switch supports mounting in any position to improve directional airflow versatility. - Features five fan speed levels powered by the PWM-controlled EC motor for more precise ventilation. - Duct Size: 4” | Dim: 6.9 x 11.9 x 7.4 in. | Airflow: 230 CFM | Noise: 60 dBA | Bearings: Dual Ball - This product is equipped with a Type-G power plug and is compatible with the voltage commonly used in the United Kingdom. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0C2W14V6L | | Air Flow Capacity | 230 Cubic Feet Per Minute | | Best Sellers Rank | 745,297 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,577 in Bathroom Fans | | Brand | AC Infinity | | Compatible Devices | Transmission Coolers | | Cooling Method | Air | | Country Of Origin | China | | Customer Reviews | 4.6 4.6 out of 5 stars (111) | | Global Trade Identification Number | 00819137023789 | | Included Components | Cord | | Item Dimensions L x W x H | 30.2L x 17.5W x 18.8H centimetres | | Item Type Name | Duct Fan | | Item Weight | 2.27 Kilograms | | Manufacturer | AC Infinity | | Material | Metal | | Noise Level | 60 Decibels | | Power Connector Type | 2-Pin | | UPC | 819137023789 | | Unit Count | 1.0 count | | Voltage | 12 Volts | | Wattage | 31.44 watts | ## Product Details - **Air flow capacity:** 230 Cubic Feet Per Minute - **Brand:** AC Infinity - **Compatible devices:** Transmission Coolers - **Cooling method:** Air - **Material:** Metal - **Noise level:** 60 Decibels - **Power connector type:** 2-Pin - **Product dimensions:** 30.2L x 17.5W x 18.8H centimetres - **Voltage:** 12 Volts - **Wattage:** 31.44 watts ## Images ![Automatic Duct Fan 100mm, Inline Fan with Differential Fan Pressure Switch, Air Vent Booster for Industrial HVAC Ducting Ventilation Exhaust Systems, 4-Inch - Image 1](https://m.media-amazon.com/images/I/51DcPrezDUL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***T on 19 November 2025* Triggers reliably, relatively quiet. I'm using this as a make up air unit for my laundry room. I put the pitot tube on my dryer, while the fan is just behind a damper on an intake duct. Because of the intended use as a booster, this is programmed to shut off for a bit every five minutes to see if there is still flow with the motor off. For my use I wish there was a mode that doesn't need to shut off to sense, as the fan is on a different duct. This is still a very affordable universal make up air unit. ### ⭐⭐⭐⭐⭐ Review *by A***T on 23 December 2025* Easy to install. Automatic turn on/off via pressure sensing is great. This allows me to installed it in the attic. My pipe run up 10' wall then turn 45 degree for 5' then run to the roof for another 4' or so. I guess this was too long for the new LG dryer because if keeps throwing the d80 code. The fan was installed on a 45 degree without any problem with the flexible hose + clamps. No mode d80 code from the LG dryer and the clothes dry so much faster. ### ⭐⭐⭐⭐⭐ Review *by R***T on 17 October 2025* It works! Used to boost airflow to far end of house from a concealed duct heat pump. The automatic pressure detect works perfectly. I can even set my heat pump to 1% fan speed and the unit still detects the pressure difference and turns on! Glad i found it. Seems like a better option than the floor register boosters. ## Frequently Bought Together - AC Infinity Automatic Duct Fan 4", Inline Fan with Differential Fan Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems - AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.cy/products/531929416-automatic-duct-fan-100mm-inline-fan-with-differential-fan-pressure](https://www.desertcart.com.cy/products/531929416-automatic-duct-fan-100mm-inline-fan-with-differential-fan-pressure) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-04-24*