--- product_id: 659464665 title: "TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications" brand: "top-vigor" price: "฿2404" currency: THB in_stock: true reviews_count: 3 category: "Top Vigor" url: https://www.desertcart.co.th/products/659464665-top-vigor-4-inch-hvac-duct-manual-volume-damper-galvanized store_origin: TH region: Thailand --- # 4-inch precision fit Smooth rotary airflow control Galvanized iron durability TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications **Brand:** top-vigor **Price:** ฿2404 **Availability:** ✅ In Stock ## Summary > 🔧 Control your airflow like a pro—because comfort is non-negotiable! ## Quick Answers - **What is this?** TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications by top-vigor - **How much does it cost?** ฿2404 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/659464665-top-vigor-4-inch-hvac-duct-manual-volume-damper-galvanized) ## Best For - top-vigor enthusiasts ## Why This Product - Trusted top-vigor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **DIY & Pro Friendly:** Simple slide-in installation with no special tools needed—perfect for managers who value efficiency. - • **Backdraft Prevention:** Effectively seals ducts to stop cold air infiltration and unwanted reverse airflow. - • **Precision 4-Inch Fit:** Seamlessly integrates with standard HVAC ducts for hassle-free installation. - • **Rugged Galvanized Iron Build:** Engineered to resist corrosion and high temperatures, ensuring long-lasting performance. - • **Effortless Airflow Adjustment:** Side-mounted rotary handle allows smooth, multi-angle volume control to optimize ventilation. ## Overview The TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper is a durable, galvanized iron airflow control device designed for precise volume regulation and backdraft prevention in HVAC systems. Its smooth rotary handle enables easy adjustment, while its corrosion-resistant build ensures reliable, long-term use across various ventilation applications. ## Description TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - desertcart.com Review: Seals extremely well! - I have my laser engraver vented outside via a 6” duct with a flap on the outside wall. I decided to install a damper to stop cold air from coming back into my basement. When this damper is closed it completely seals off the duct and stops all cold air from backing down the duct. It is very easy to operate and has a locking wing nut to lock the damper in any position. I highly recommend this product. Review: perfect for Chinese diesel heaters - this valve is PERFECT for Chinese diesel heaters that are used to heat two different areas. very happy with its' performance!!!! ## Features - Specification: Interface OD: 97 mm / 3.82 inch; Overall Size: 200 x 1 mm / 7.87 x 0.04 inch (L*T); Color: Silver - Durable Construction: Crafted from high-quality galvanized iron, this HVAC backdraft damper offers exceptional durability, high temperature resistance and corrosion protection, ensuring long-term use without deformation or fading. - Smooth Airflow Control: With the side-mounted rotary handle, You can adjust the air volume from multiple angles easily and smoothly, ventilate your HVAC system rapidly. It can also prevents reverse airflow due to wind pressure or HVAC system. - Simple Installation: Slide the damper into the ductwork and fix it with pipe clamp and tape. No professional tools or expertise required—perfect for DIY enthusiasts and professionals alike. - Wide Application: HVAC volume damper can be inserted into the flexible or non-flexible havc ducting, which is ideal for air volume regulation in various HVAC systems. Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D97BZ6C4 | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #577,209 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,528 in HVAC Ducting | | Customer Reviews | 5.0 5.0 out of 5 stars (8) | | Date First Available | July 11, 2024 | | Item Package Quantity | 1 | | Item Weight | 1.31 pounds | | Manufacturer | TOP-VIGOR | | Package Dimensions | 7.87 x 5.51 x 3.94 inches | | Size | 4 Inch | ## Images ![TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - Image 1](https://m.media-amazon.com/images/I/61JZGGAbhFL.jpg) ![TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - Image 2](https://m.media-amazon.com/images/I/61T3WH7gnTL.jpg) ![TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - Image 3](https://m.media-amazon.com/images/I/71r2PK6VRyL.jpg) ![TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - Image 4](https://m.media-amazon.com/images/I/71KLZY0isEL.jpg) ![TOP-VIGOR 4 Inch HVAC Duct Manual Volume Damper, Galvanized Iron Airflow Control Backdraft Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - Image 5](https://m.media-amazon.com/images/I/71893906MtL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Seals extremely well! *by G***T on January 25, 2026* I have my laser engraver vented outside via a 6” duct with a flap on the outside wall. I decided to install a damper to stop cold air from coming back into my basement. When this damper is closed it completely seals off the duct and stops all cold air from backing down the duct. It is very easy to operate and has a locking wing nut to lock the damper in any position. I highly recommend this product. ### ⭐⭐⭐⭐⭐ perfect for Chinese diesel heaters *by D***X on December 15, 2025* this valve is PERFECT for Chinese diesel heaters that are used to heat two different areas. very happy with its' performance!!!! ### ⭐⭐⭐⭐⭐ Review *by T***S on March 23, 2025* Excelente calidad, muy buen precio. Llegó antes de tiempo ## Frequently Bought Together - TOP-VIGOR 3 Inch HVAC Duct Backdraft Damper Manual Volume Damper, Adjustment Airflow Ducting Damper for ACS, Vents, Fans, Extractors, Range Hoods, Heating Systems, and Other HVAC Applications - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust - EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm) --- ## 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.co.th/products/659464665-top-vigor-4-inch-hvac-duct-manual-volume-damper-galvanized](https://www.desertcart.co.th/products/659464665-top-vigor-4-inch-hvac-duct-manual-volume-damper-galvanized) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-25*