--- product_id: 372298987 title: "HVAC Premium 4\" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long" brand: "hvac premium" price: "¥47475" currency: JPY in_stock: true reviews_count: 5 category: "Hvac Premium" url: https://www.desertcart.jp/products/372298987-hvac-premium-4-inch-aluminum-hose-flexible-insulated-r-4 store_origin: JP region: Japan --- # Flexible w/ No Kinks Air-tight Inner Core R-4.2 Insulation Value HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long **Brand:** hvac premium **Price:** ¥47475 **Availability:** ✅ In Stock ## Summary > 🌀 Flex your airflow with premium insulation that works as hard as you do! ## Quick Answers - **What is this?** HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long by hvac premium - **How much does it cost?** ¥47475 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/372298987-hvac-premium-4-inch-aluminum-hose-flexible-insulated-r-4) ## Best For - hvac premium enthusiasts ## Why This Product - Trusted hvac premium brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Armor:** Tear- and puncture-resistant metallized polyester jacket stands up to wear and pests. - • **Hygienic Airflow:** Air-tight inner core prevents fiberglass erosion and bacterial buildup for cleaner air. - • **Plug & Play Ready:** Includes 2 clamps for quick, secure installation—get your system running faster. - • **Unmatched Flexibility:** Engineered to bend and twist without kinking—perfect for complex duct layouts. - • **Superior Thermal Defense:** R-4.2 fiberglass insulation locks in energy, slashing HVAC costs and boosting comfort. ## Overview This 25-foot HVAC Premium 4" aluminum flexible duct features a high R-4.2 fiberglass insulation rating, an air-tight inner core to reduce pressure loss and prevent contamination, and a reinforced metallized polyester jacket for durability. Designed to resist kinks and sharp bends, it ensures efficient, hygienic airflow in heating and cooling systems, meeting ISO and international standards. ## Description 4" Inch Flexible Aluminum Ducting Hose Insulated R-4.2 Air Duct Pipe for Rigid HVAC Flex Ductwork Insulation - 25' Feet Long This Aluminum Flex Duct is intended to be used in heating, cooling, ventilation and waste gases transmission lines. Suitable for medium pressure application. It has an outer surface made of High Quality Aluminum Foil and an inner surface made of Metalized PET with high-tensile spring steel wire between the layers. Thermally insulated with Glass-Wool insulation developed especially for flexible ducting. Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns, and to hold steady and at full diameter in all applications. All steel wire are applied between PET surfaces to prevent corrosion (oxidization). Produced in accordance with ISO 9001 - 2008 Quality Management System. Complies with industry standards of USA: AS D-882. European: EN 10270-1-SM. & EN 13180 standards By means of the smooth surface, which the interior PET provides, this flex duct decreases the pressure loss and provides more hygienic environment by preventing the formation of bacteria. Review: Good - Good quality, easy to work with. Replaced old duct that mice chewed into, hopefully this is more of a barrier. Review: Works as it should - Rerouted some ductwork.. worked amazing.. did it myself .. great purchase ## Features - High Quality: Aluminum Housing On the Outside and on the Inside For The Best Insulation Value - Air-tight Inner Core Decreases The Pressure Loss and Provides A More Hygienic Environment- High Energy Efficient / No fiberglass erosion into air stream. - Thick Blanket of Fiberglass Insulation: Which Gives You A R-Value of 4.2 - Tough Reinforced Metallized Polyester Jacket - Tear and puncture resistant - Air-tight Inner Core - No fiberglass erosion into air stream. - Designed To withhold Bends And Sharp Turns Without Kinking - 2 Clamps included ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B078HS3NL3 | | Best Sellers Rank | #151,787 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #204 in Heating & Cooling Ducting Products | | Brand | HVAC Premium | | Brand Name | HVAC Premium | | Color | R-4.2 Yellow | | Colour | R-4.2 Yellow | | Customer Reviews | 4.6 out of 5 stars 236 Reviews | | Item Dimensions L x W | 7.62L x 0.1W Meters | | Item Length | 25 Feet | | Item Type Name | Flexible Duct | | Item Weight | 2.84 Kilograms | | Item weight | 2.84 Kilograms | | Manufacturer | HVAC Premium | | Material | Aluminum | | Material Type | Aluminum | | Nominal Wall Thickness | 0.1 inches | | Nominal wall thickness | 0.1 inches | | Outside Diameter | 4 Inches | | Product dimensions | 7.62L x 0.1W Meters | | UPC | 810116310159 635133967632 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** HVAC Premium - **Material:** Aluminum, Metalized PET - **Colour:** Silver - **Product dimensions:** 7.62L x 0.08W Meters - **Item weight:** 0.82 Kilograms ## Images ![HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long - Image 1](https://m.media-amazon.com/images/I/71Vt+SFX-eL.jpg) ![HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long - Image 2](https://m.media-amazon.com/images/I/71uvwMesa0L.jpg) ![HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long - Image 3](https://m.media-amazon.com/images/I/710NNz+SV9L.jpg) ![HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long - Image 4](https://m.media-amazon.com/images/I/71gahP+qlpL.jpg) ![HVAC Premium 4" Inch Aluminum Hose Flexible Insulated R-4.2 Air Duct Pipe for Rigid Flex Ductowrk Insulation - 25' Feet Long - Image 5](https://m.media-amazon.com/images/I/61htbzVmJhL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by J***Y on 9 June 2025* Good quality, easy to work with. Replaced old duct that mice chewed into, hopefully this is more of a barrier. ### ⭐⭐⭐⭐⭐ Works as it should *by A***A on 8 February 2025* Rerouted some ductwork.. worked amazing.. did it myself .. great purchase ### ⭐⭐⭐⭐⭐ AC *by K***H on 1 May 2026* Worked great ## Frequently Bought Together - HVAC Premium 3" Inch Aluminum Hose Flexible Air Duct Pipe for Rigid HVAC Flex Ductwork - 25' Feet Long - EesTeck 4Pcs 3" Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps （65mm-89mm） - 3 Inch Vent Cover, Hon&Guan 3 Soffit Vents Exterior Round Soffit Vents with Built-in a Fly Screen for Bathroom Office Home-2PCS --- ## 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.jp/products/372298987-hvac-premium-4-inch-aluminum-hose-flexible-insulated-r-4](https://www.desertcart.jp/products/372298987-hvac-premium-4-inch-aluminum-hose-flexible-insulated-r-4) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-10*