--- product_id: 125367109 title: "DB204 in-Line Duct Air Booster Fan, 4 Inch" brand: "suncourt" price: "€ 94.58" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.hr/products/125367109-db204-in-line-duct-air-booster-fan-4-inch store_origin: HR region: Croatia --- # Easy crimp & bead install 4-inch airflow booster Thermally protected motor DB204 in-Line Duct Air Booster Fan, 4 Inch **Brand:** suncourt **Price:** € 94.58 **Availability:** βœ… In Stock ## Summary > 🌬️ Elevate your indoor air gameβ€”comfort that’s easy to install and hard to live without! ## Quick Answers - **What is this?** DB204 in-Line Duct Air Booster Fan, 4 Inch by suncourt - **How much does it cost?** € 94.58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/125367109-db204-in-line-duct-air-booster-fan-4-inch) ## Best For - suncourt enthusiasts ## Why This Product - Trusted suncourt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Plug & Play Convenience:** Includes power cord and screws for hassle-free setup - β€’ **Whisper-Quiet Operation:** Balanced tip-throw blade and oil reservoir ensure silent performance - β€’ **Universal Fit for Any Duct:** Seamlessly integrates with flexible or rigid ducts - β€’ **Boost Your Airflow Instantly:** Solve hot/cold room issues without costly HVAC overhauls - β€’ **Durable & Corrosion-Resistant:** Built to last with metal housing that withstands wear ## Overview The SUNCOURT INC DB204 is a 4-inch in-line duct air booster fan designed to enhance airflow in rooms with temperature imbalances or poor ventilation. Featuring a thermally protected Class B motor with a large oil reservoir, it operates quietly and reliably. Its corrosion-resistant metal construction fits both flexible and rigid ducts, installs easily with a crimp and bead design, and comes UL approved with included power cord and mounting screws. ## Description In-line duct fan solves air delivery problems without major system rework or expense. Applications include boosting airflow to rooms that are too hot or too cold and general ventilation of clean indoor air. Designed to fit flexible and rigid ducts. Fan has 1 end with a crimp and bead design for easy installation. Sleeve bearings allow for installation at almost any angle. Features a tip-throw, balanced blade. Thermally protected Class B motor has large oil reservoir to ensure a quiet, long life. Made of corrosion-resistant metal. Not to be used in temperatures exceeding 140 deg (degree). Includes attached power cord and installment screws. UL approved. 1 year limited . ## Features - In-line duct fan solves air delivery problems without major system rework or expense - Applications include boosting airflow to rooms that are too hot or too cold and general ventilation of clean indoor air - Designed to fit flexible and rigid ducts ## Product Details - **Brand:** Suncourt - **Electric fan design:** Exhaust Fan - **Power Source:** Corded Electric - **Style:** Modern - **Product Dimensions:** 30"D x 8"W x 6"H - **Recommended Uses For Product:** Exhausting - **Wattage:** 1 watts - **Finish Type:** Oil Rubbed - **Item Weight:** 16 ounces - **Indoor/Outdoor Usage:** Indoor ## Images ![DB204 in-Line Duct Air Booster Fan, 4 Inch - Image 1](https://m.media-amazon.com/images/I/61-wrqJbCbL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Radon Gas removal *by E***T on Reviewed in the United States πŸ‡ΊπŸ‡Έ on April 9, 2012* I found out I had a severe Radon gas situation (4 times the minimum safe level) in our basement that was half cement floor and half bare earth floor separated by a cinder-block wall. Installed one of these inline vents (4 inch diameter)and have been able to reduce the Radon levels in the lower section of the house to acceptable levels, by using these in line fans to suck out the air from the bare earth section and vent to the outside. A small cost for the great dangers Radon gas can cause.Best features, rather low cost, and most of all, really quiet !!This particular size fan is located in the bath room of the basement, and thus actually performs *double duty*. One is venting out Radon gas laden air out to the outside atmosphere (365-24-7), and two (not a bad idea) to remove the *not so nice smelling air* caused by using the bathroom for the #2 bodily functions ...The remainder of the cellar is vented out by two (2) larger in-line vents (6 inch diameter) each pumping out 250 CFM (also 365-24-7) of contaminated air.A *pro* installation runs about $2000, while our home-made project was less than $100 ### ⭐⭐⭐⭐ duct fan *by R***R on Reviewed in the United States πŸ‡ΊπŸ‡Έ on December 28, 2009* I had a slightly unusual use for this fan. I wanted to transfer heat from the closet where my furnace resides to an adjacent room that has no central heat source. I used a 4 inch dryer vent hose to connect the two spaces. Initially I used the duct fan to "push" the warm air from the furnace closet to the room--not very effective. Very little air movement could be detected on the discharge end of the hose. I then placee the duct fan at the discharge end to "pull" the warm air from the furnace closet. This worked much better. However, I had hoped for a bit more air movement. All in all it seems worth the effort and the fan wasn't very expensive. ### ⭐⭐⭐⭐ Overall good fan *by M***R on Reviewed in the United States πŸ‡ΊπŸ‡Έ on October 6, 2012* I pretty much knew what I was ordering when I bought this fan. But, I was a little curious why this was listed as a 80 CFM fan and other 4" inline duct fans are 65 CFM. When it arrived I discovered it is 65 CFM free air and 80 CFM boosted. Technically the listing isn't incorrect but it is misleading. I could have bought this same fan at my local menards for about the same price but I bought this because I thought it was 80 CFM. This is really only a 65 CFM fan! Besides that it works well and is a quality product. Good shipping. Good price. --- ## 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.hr/products/125367109-db204-in-line-duct-air-booster-fan-4-inch](https://www.desertcart.hr/products/125367109-db204-in-line-duct-air-booster-fan-4-inch) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-09*