--- product_id: 492832840 title: "5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems" brand: "cuchiilo" price: "€ 242.91" currency: EUR in_stock: true category: "Cuchiilo" url: https://www.desertcart.hr/products/492832840-5-inch-insulated-flexible-duct-25-feet-r4-2-heating store_origin: HR region: Croatia --- # Up to 85% noise reduction Flame retardant & heat resistant R4.2 thermal insulation 5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems **Brand:** cuchiilo **Price:** € 242.91 **Availability:** ✅ In Stock ## Summary > 🌬️ Flex your airflow with the duct that works as hard as you do! ## Quick Answers - **What is this?** 5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems by cuchiilo - **How much does it cost?** € 242.91 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/492832840-5-inch-insulated-flexible-duct-25-feet-r4-2-heating) ## Best For - cuchiilo enthusiasts ## Why This Product - Trusted cuchiilo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Thickened aluminum foil with spiral steel wire ensures durability and flexibility without sagging. - • **Effortless Installation:** Flexible 5-inch duct bends easily—no rigid elbows needed, maintaining airflow and reducing resistance. - • **Versatile HVAC Solution:** Perfect for central air, fresh air ventilation, and mechanical recovery systems without corrosive gases. - • **Whisper-Quiet Operation:** Advanced sound-absorbing insulation reduces noise by up to 85%, creating a peaceful environment. - • **Superior Thermal Barrier:** R4.2 glass wool insulation keeps your HVAC system energy-efficient and cost-effective. ## Overview The Cuchiilo 5 Inch Insulated Flexible Duct offers a 25-foot length of high-performance HVAC ducting featuring R4.2 Owens Corning glass wool insulation for superior thermal efficiency and sound absorption. Constructed with durable aluminum foil and spiral steel wire, it resists heat up to 454°C and reduces noise by up to 85%. Its flexible design simplifies installation while maintaining optimal airflow, making it ideal for a variety of ventilation systems. ## Description Cuchiilo 5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems - desertcart.com ## Features - 【🌿🛒High-quality performance 5 insulated flexible duct】Made of thickened aluminum foil material and made of high-strength elastic spiral steel wire.The middle is covered with glass fiber insulation layer, which has high temperature resistance, acid and alkali resistance, and flame retardancy. - 【🌿🛒Owens Corning Glass Wool Insualtion 】Glass wool Insualtion is the safest building material, with high corrosion resistance and thermal insulation,R value: R-4.2. The temperature resistance range is -4℃~454℃. - 【🌿🛒Sound absorption and noise reduction insulation】 The internal structure of glass wool insulationis fluffy and the overall density is large, which can absorb the sound in time,Noise can be reduced by up to 85%. - 【🌿🛒5 inch insulated flexible duct】 It can be bent arbitrarily, without rigid elbows, the aluminum foil is self-sustaining and will not retract after installation.It can maintain the flatness in the tube and reduce the wind resistance. - 【🌿🛒Multi Function of the 5 inch insulated flexible duct】Used for high, medium and low pressure ventilation system without corrosive gas. Mainly used in central air conditioning HVAC system,Fresh air ventilation systems, mechanical equipment recovery systems and other ventilation systems that do not contain corrosive gases, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BGX4HYSZ | | Best Sellers Rank | #43,198 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #63 in HVAC Ducting | | Brand Name | Cuchiilo | | Coverage | Area or volume that the duct can effectively insulate based on its R-value and dimensions | | Customer Reviews | 4.3 4.3 out of 5 stars (316) | | Item Dimensions L x W | 300"L x 5"W | | Item Thickness | 5 Inches | | Manufacturer | Cuchiilo | | Material Type | Aluminum foil, glass wool insulation, and spiral steel wire | | Recommended Uses For Product | Thermal insulation, Sound insulation, Fire resistance | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Cuchiilo - **Item Thickness:** 5 Inches - **Material:** Aluminum foil, glass wool insulation, and spiral steel wire - **Product Dimensions:** 300"L x 5"W - **Recommended Uses For Product:** Thermal insulation, Sound insulation, Fire resistance ## Images ![5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems - Image 1](https://m.media-amazon.com/images/I/71WBnYiYrLL.jpg) ![5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems - Image 2](https://m.media-amazon.com/images/I/712OBBWkU6L.jpg) ![5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems - Image 3](https://m.media-amazon.com/images/I/71ia-CZVOOL.jpg) ![5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems - Image 4](https://m.media-amazon.com/images/I/7198Zk97eXL.jpg) ![5 Inch Insulated Flexible Duct - 25 Feet, R4.2, For Heating & Air Conditioning HVAC Systems - Image 5](https://m.media-amazon.com/images/I/71ydRiEVRQL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Why is it important to have HVAC insulated ducts in a building?** A: Insulated ducts help maintain consistent temperature levels and prevent energy loss. They also reduce condensation and help improve indoor air quality. **Q: Do insulated HVAC ducts help reduce noise from the HVAC system?** A: It may help reduce noise the importance of the insulation is to reduce condensation in changeable temperature areas. **Q: Can this be used for a bathroom vent fan?** A: Yes you can. **Q: Are there any maintenance tips for ensuring the longevity of insulated HVAC ducts?** A: Regular inspections for damage or wear, proper sealing of joints, and keeping the ducts clean can help extend the life of insulated HVAC ducts. ## Frequently Bought Together - Cuchiilo 5 Inch 25 Feet Insulated Flexible Duct R4.2,5 Inch Insulated Flexible Duct,5 Insulated Flexible Duct,5 Flexible Duct,5 Insulated Duct,for Heating and Air Conditioning HVAC Systems - EesTeck 5" Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 118mm-140mm) --- ## 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.hr/products/492832840-5-inch-insulated-flexible-duct-25-feet-r4-2-heating](https://www.desertcart.hr/products/492832840-5-inch-insulated-flexible-duct-25-feet-r4-2-heating) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-12*