--- product_id: 21547316 title: "Rubber-Cal \"HVAC Insulated-Flex\" Ducting Ventilation Duct Hose, 4-Inch by 25-Feet" brand: "rubber-cal" price: "¥33745" currency: JPY in_stock: true reviews_count: 13 category: "Rubber Cal" url: https://www.desertcart.jp/products/21547316-rubber-cal-hvac-insulated-flex-ducting-ventilation-duct-hose-4 store_origin: JP region: Japan --- # 4-inch diameter, 25-ft length Acoustical insulation reduces noise Thermal insulation -20°F to 160°F Rubber-Cal "HVAC Insulated-Flex" Ducting Ventilation Duct Hose, 4-Inch by 25-Feet **Brand:** rubber-cal **Price:** ¥33745 **Availability:** ✅ In Stock ## Summary > ❄️🔥 Keep your airflow flawless and your workspace cool (or warm) with style! ## Quick Answers - **What is this?** Rubber-Cal "HVAC Insulated-Flex" Ducting Ventilation Duct Hose, 4-Inch by 25-Feet by rubber-cal - **How much does it cost?** ¥33745 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/21547316-rubber-cal-hvac-insulated-flex-ducting-ventilation-duct-hose-4) ## Best For - rubber-cal enthusiasts ## Why This Product - Trusted rubber-cal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Double-Ply Insulation:** Aluminum foil + PET film layers with glass wool for superior thermal and sound control. - • **Sleek Metallic Finish:** Shiny silver exterior adds a professional, high-tech look to any installation. - • **Wide Temperature Range:** Operates flawlessly from freezing cold to scorching heat (-20°F to 160°F). - • **Flexible & Compressible:** Easily transport and install anywhere, perfect for dynamic workspaces and on-the-go pros. - • **Cost-Effective HVAC Solution:** Premium performance without the premium price tag—maximize ROI on every project. ## Overview The Rubber-Cal HVAC Insulated-Flex Ducting Hose is a 4-inch by 25-foot flexible duct designed for efficient air movement in HVAC systems. Featuring double-ply aluminum and PET film insulation with glass wool, it maintains air temperature between -20°F and 160°F while reducing noise. Its compressible design ensures easy transport and installation, making it ideal for both permanent and mobile air conditioning units. This cost-effective, durable ducting solution combines performance with a sleek metallic finish, backed by a 3-year warranty. ## Description The inch HVAC insulated-flex" hose is a superb choice for HVAC air duct use. These flexible ducts for air conditioning applications are Double-Ply insulated flexible hoses that are made of aluminum foil and pet film layers. Each HVAC flexible duct is insulated with glass wool material. This product is beneficial to consumers because of its affordable price point. It is definitely a more cost-effective HVAC ducting option than other competing flex hoses. It will also look good in any setting that it is placed in thanks to the Shiny Silver insulation material on the outside of the hose. The insulated nature of this portable air Conditioner hose allows it to operate in both high and low temperatures. The Double-Ply insulated material of this HVAC flex ductwork allows it to function well in temperature ranges between -20F and 160F. Whether your application involves the transfer of cold air or hot air, these HVAC ducts for air conditioning uses can maintain their structural integrity with ease. A key advantage of this HVAC flexible duct is how easy it is to handle. This is a portable air Conditioner hose that can be easily compressed for transportation purposes. This is a great HVAC flexible insulated duct to have If your applications are constantly on the move. Each flexible hose comes in several different internal diameter (ID) options. The available sizes are 4", 6", 8", 10", and 12". no matter what size you get them in, all of the HVAC flexible ducts come in a Shiny, Metallic Silver color. These ducts for air conditioning are meant for residential and industrial air movement applications. It is a fairly adaptable flex hose that can function well in a variety of venues. Use this HVAC ducting for applications such as AC ventilation, cold air supply, confined space ventilation, utility blowers, dehumidification, and more. Get this HVAC air flexible duct today to have the best insulated product for your air movement applications Review: It works - Good product but hard to cut. The yellow insulation is very brittle and itchy. Review: Good quality - 12 inch size. Just as good as any a/c hose I have ever used and priced well. Fit on the connectors easily. Don't judge my temporary installation, just keeping things cool during a remodel. If you roll a couple inches of the foil sheath back under as pictured it hides and contains the fiberglass that is very dusty and itchy. ## Features - Compressible and easy to transport - An extremely cost effective insulated duct - Provides acoustical as well as thermal insulation - Insulation maintains temperature of air inside hose - Ideal for use for permanent and mobile air condition units ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00N2IMNKW | | Best Sellers Rank | #40,894 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #53 in HVAC Ducting | | Brand | Rubber-Cal | | Brand Name | Rubber-Cal | | Color | 845605000000 | | Customer Reviews | 4.3 out of 5 stars 913 Reviews | | Global Trade Identification Number | 00845605070061 | | Included Components | Hose | | Item Dimensions L x W | 300"L x 4"W | | Item Length | 25 feet | | Item Type Name | Duct | | Manufacturer | Rubber-Cal | | Manufacturer Warranty Description | Three year warranty - rubber-cal, inc. Offers the following limited warranty on all sheet rubber, flooring and matting products for a period of three years from date of sale to the original purchaser of our products. For a complete outline of rubber-cal's three year warranty please visit www. Rubbercal. Com. | | Material | Aluminum | | Material Type | Aluminum | | Product Dimensions | 300"L x 4"W | | UPC | 845605070061 | | Unit Count | 1 Count | ## Product Details - **Brand:** Rubber-Cal - **Material:** Aluminum - **Color:** 845605000000 - **Product Dimensions:** 300"L x 4"W - **Item Length:** 25 Feet - **UPC:** 845605070061 - **Manufacturer:** Rubber-Cal - **Global Trade Identification Number:** 00845605070061 ## Images ![Rubber-Cal "HVAC Insulated-Flex" Ducting Ventilation Duct Hose, 4-Inch by 25-Feet - Image 1](https://m.media-amazon.com/images/I/71zC7HmIw4L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ It works *by H***P on July 23, 2025* Good product but hard to cut. The yellow insulation is very brittle and itchy. ### ⭐⭐⭐⭐⭐ Good quality *by F***L on May 23, 2025* 12 inch size. Just as good as any a/c hose I have ever used and priced well. Fit on the connectors easily. Don't judge my temporary installation, just keeping things cool during a remodel. If you roll a couple inches of the foil sheath back under as pictured it hides and contains the fiberglass that is very dusty and itchy. ### ⭐⭐⭐⭐ Tight fit *by L***N on January 27, 2024* I would guess it is a R4 rating. It is very tight to fit a 12" duct. I managed to get it on but it took effort and I did not need tape or strap to hold it in place. The inside is a thin cheap film compared to the normal thin cheap plastic but it did not tear or puncher when I forced it on the opening. Time will tell if it was a good buy. ## Frequently Bought Together - Rubber-Cal "HVAC Insulated-Flex" Ducting Ventilation Duct Hose, 4-Inch by 25-Feet - EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm) - QWORK 4" Duct Splitter, 45° Degree 4 Inch Branch Metal Duct Connector 3 Way Hose Adapter/Splitter --- ## 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/21547316-rubber-cal-hvac-insulated-flex-ducting-ventilation-duct-hose-4](https://www.desertcart.jp/products/21547316-rubber-cal-hvac-insulated-flex-ducting-ventilation-duct-hose-4) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-16*