--- product_id: 2834758 title: "Fantech 9800000 RSK-4 Backdraft Damper, 4\" Duct" brand: "fantech" price: "€ 68.82" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.be/products/2834758-fantech-9800000-rsk-4-backdraft-damper-4-duct store_origin: BE region: Belgium --- # Lightweight aluminum blades for smooth airflow Spring-loaded for reliable backdraft prevention Galvanized steel collar for durability Fantech 9800000 RSK-4 Backdraft Damper, 4" Duct **Brand:** fantech **Price:** € 68.82 **Availability:** ✅ In Stock ## Summary > 💨 Stop the Backdraft, Start the Fresh Flow! ## Quick Answers - **What is this?** Fantech 9800000 RSK-4 Backdraft Damper, 4" Duct by fantech - **How much does it cost?** € 68.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/2834758-fantech-9800000-rsk-4-backdraft-damper-4-duct) ## Best For - fantech enthusiasts ## Why This Product - Trusted fantech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by HVAC Pros:** Highly rated by installers for durability and smooth operation—upgrade your ventilation with confidence. - • **Premium US-Made Quality:** Crafted in the USA with galvanized steel and aluminum for long-lasting performance you can trust. - • **Optimized Spring Tension:** Balanced spring strength prevents backdrafts without compromising airflow, ideal for low static pressure systems. - • **Engineered for Silent Efficiency:** Rubber gasket ensures whisper-quiet operation—no more noisy vents disrupting your space. - • **Precision Fit for Seamless Installation:** Designed to drop perfectly into standard 4" ducts, saving you time and hassle. ## Overview The Fantech 9800000 RSK-4 Backdraft Damper features a galvanized steel collar and lightweight aluminum blades, spring-loaded for positive closure to prevent unwanted airflow reversal. Made in the USA, it fits standard 4" ducts and is engineered for quiet, reliable operation in residential and commercial ventilation systems. ## Description Fantech RSK Series Backdraft Damper. Review: Spring might be too weak for others, fine for me - I live in a typical NYC apartment building. The typical thing about buildings like these are.... Generally terrible and cursed things everywhere. Including the mechanicals. Like many many NYC buildings, the exhaust-only ventilation system is not working correctly, and sometimes backdrafts. The building does not understand this, and nobody cares. In addition to being unpleasant with the smells, it can also be an infectious disease hazard (all airborne diseases, like the flu, COVID, and similar, can travel through ventilation systems). Eventually I got tired of trying to do the right thing (them fixing it CORRECTLY) and looked for a weakly-sprung backdraft damper to do the job. There aren't many useful square ones, the good ones are all round. Anything with a strong spring will fail to open under the poor static pressure when the ventilation system is operating semi-correctly. This fit the bill. It's almost too weak to close correctly, but if installed with the right tilt, it works fine. I had to use like 4 pounds of duct putty, but I stuck a round damper in a square hole! Review: The Fantech Backdraft Damper is First Rate! - Very well made, it impressed the guy installing the vent hood and ductwork. He had done an installation in the same floor model home 3 doors away, and had to remove the cheap damper supplied by the homeowner, as it was noisy and started spinning around when air flowed. The Fantech mounting system prevents it from spinning, and the rubber gasket makes the operation silent. It opens easily, even on the low (110 CFM) position of my Elica vent hood. The fit and finish is very good. It dropped right into the 7" to 5" reducer, as both were perfectly round. Note: The cheap duct parts tend to easily get out-of-round, are harder to assemble, and make noise. Buy good stuff, including this Fantech backdraft damper. ## Features - Backdraft dampers with galvanized steel collar and lightweight aluminum damper blades - Spring loaded for positive closure - Country of origin: United States ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000CDAFE6 | | Auto Part Position | Rear | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #322,120 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #796 in HVAC Ducting | | Brand | FANTECH | | Brand Name | FANTECH | | Compatible with Vehicle Type | Truck | | Customer Reviews | 4.2 out of 5 stars 553 Reviews | | Extended Length | 5.75 Inches | | Exterior Finish | Black | | Global Trade Identification Number | 00650737690403 | | Item Type Name | 9800000 | | Manufacturer | Fantech | | Manufacturer Part Number | 9800000 | | Material | Alloy Steel, Aluminum | | Material Type | Alloy Steel, Aluminum | | Model Number | 9800000 | | Style | Modern | | Style Name | Modern | | UPC | 650737690403 094700492296 787461658222 | | Unit Count | 1 Count | | Vehicle Service Type | Truck | ## Product Details - **Brand:** FANTECH - **Auto Part Position:** Rear - **Style:** Modern - **Vehicle Service Type:** Truck - **Exterior Finish:** Black ## Images ![Fantech 9800000 RSK-4 Backdraft Damper, 4" Duct - Image 1](https://m.media-amazon.com/images/I/611bewWHdNL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Spring might be too weak for others, fine for me *by A***R on November 14, 2023* I live in a typical NYC apartment building. The typical thing about buildings like these are.... Generally terrible and cursed things everywhere. Including the mechanicals. Like many many NYC buildings, the exhaust-only ventilation system is not working correctly, and sometimes backdrafts. The building does not understand this, and nobody cares. In addition to being unpleasant with the smells, it can also be an infectious disease hazard (all airborne diseases, like the flu, COVID, and similar, can travel through ventilation systems). Eventually I got tired of trying to do the right thing (them fixing it CORRECTLY) and looked for a weakly-sprung backdraft damper to do the job. There aren't many useful square ones, the good ones are all round. Anything with a strong spring will fail to open under the poor static pressure when the ventilation system is operating semi-correctly. This fit the bill. It's almost too weak to close correctly, but if installed with the right tilt, it works fine. I had to use like 4 pounds of duct putty, but I stuck a round damper in a square hole! ### ⭐⭐⭐⭐⭐ The Fantech Backdraft Damper is First Rate! *by D***. on October 25, 2014* Very well made, it impressed the guy installing the vent hood and ductwork. He had done an installation in the same floor model home 3 doors away, and had to remove the cheap damper supplied by the homeowner, as it was noisy and started spinning around when air flowed. The Fantech mounting system prevents it from spinning, and the rubber gasket makes the operation silent. It opens easily, even on the low (110 CFM) position of my Elica vent hood. The fit and finish is very good. It dropped right into the 7" to 5" reducer, as both were perfectly round. Note: The cheap duct parts tend to easily get out-of-round, are harder to assemble, and make noise. Buy good stuff, including this Fantech backdraft damper. ### ⭐⭐⭐⭐ Works well. Some negative reviewers may have installed incorrectly or have unrealistic expections *by A***N on January 13, 2016* Well constructed. No complaints. I think negative reviews from some reflect misunderstanding of how these work. Complaints have been that the spring is not strong enough to shut the damper when the positive air pressure is removed. In fact, the spring is rather light, but it needs to be. First, make sure you install this correctly with the axis oriented vertically (NOT horizontally as shown in the product photo). The vertical axis allows the flaps to work freely with minimal effect of gravity. Second, don't bind the hinge with tape. There's plenty of room for tape to form a good seal around the collar without impeding the hinge. Finally, keep in mind that the spring only needs to return the flaps a small part of the way. While the spring can and may force the flaps closed, it's really the backdraft itself that will force them closed. The spring needs to be light enough to allow your fan to draw the flaps open easily. ## Frequently Bought Together - Fantech 9800000 RSK-4 Backdraft Damper, 4" Duct - Fantech CG 4 Contour Grille with Collar for 4" Duct - Fantech FR 110 Inline Centrifugal Duct Fan, Molded Housing, 4" --- ## 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.be/products/2834758-fantech-9800000-rsk-4-backdraft-damper-4-duct](https://www.desertcart.be/products/2834758-fantech-9800000-rsk-4-backdraft-damper-4-duct) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-26*