---
product_id: 492832840
title: "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"
brand: "cuchiilo"
price: "€ 144.26"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sk/products/492832840-cuchiilo-5-inch-25-feet-insulated-flexible-duct-r4-2
store_origin: SK
region: Slovakia
---

# Up to 85% noise reduction Temperature resistance -4℃ to 454℃ R-4.2 thermal insulation rating 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

**Brand:** cuchiilo
**Price:** € 144.26
**Availability:** ✅ In Stock

## Summary

> 🌬️ Elevate your airflow game with flexible, quiet, and efficient ducting!

## Quick Answers

- **What is this?** 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 by cuchiilo
- **How much does it cost?** € 144.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/492832840-cuchiilo-5-inch-25-feet-insulated-flexible-duct-r4-2)

## 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

- • **Premium R-4.2 Insulation:** Maximize energy efficiency with industry-leading thermal resistance.
- • **Superior Noise Dampening:** Cut down HVAC noise by up to 85% for a quieter workspace.
- • **Versatile HVAC Compatibility:** Perfect for central AC, fresh air, and mechanical ventilation systems without corrosive gases.
- • **Extreme Temperature Durability:** Operates flawlessly from freezing cold to intense heat (-4℃ to 454℃).
- • **Flexible & Self-Supporting Design:** Bend freely without rigid elbows; maintains shape to reduce airflow resistance.

## Overview

This 5-inch, 25-foot insulated flexible duct features thick aluminum foil, high-strength spiral steel wire, and Owens Corning glass wool insulation rated R-4.2. It withstands temperatures from -4℃ to 454℃, reduces noise by up to 85%, and offers flexible installation without losing shape, making it ideal for professional HVAC systems seeking energy efficiency and quiet operation.

## Description

Full description not available

## 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 |
|---------------|-------|
| Manufacturer | Cuchiilo |
| Item Weight | 6.09 pounds |
| Product Dimensions | 300 x 5 x 0.04 inches |
| Size | 5 IN 25 FT |
| Color | R-4.2 Insulation |
| Material | Aluminum foil, glass wool insulation, and spiral steel wire |
| Item Package Quantity | 1 |
| Coverage | Area or volume that the duct can effectively insulate based on its R-value and dimensions |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Aluminum foil, glass wool insulation, and spiral steel wire
- **Brand:** Cuchiilo
- **Recommended Uses For Product:** Thermal insulation, Sound insulation, Fire resistance
- **Product Dimensions:** 300"L x 5"W
- **Manufacturer:** Cuchiilo

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/71WBnYiYrLL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Use 6 inch starter attachment on main trunk
*by P***L on July 12, 2025*

Used for an additional duct line. Works just fine

### ⭐⭐⭐⭐⭐ Tough Enough if you're careful
*by M***K on December 17, 2024*

The inner "foil" layer was much tougher than another reviewer said. It's more of a "mylar" plastic silver mirror kind of material. I only needed 15 to 17 feet, so I didn't mind ruining the end I attached to a rope for pulling through the hordes of black widows and rattlers. The insulation is as expected. I did tear the outer layer just a tiny bit pulling it with a rope I'd fish-taped through a confined crawlspace trench I had to hand-excavate. Attaching it firmly to the flanges worked well however the Hose Clamp, or Radiator Clamp style items supplied were some metric size I had no socket bit for. So, picture a guy on his back in dirt with spider webs hanging down trying to use a flathead driver on his drill to tighten a long long long clamp. One spider said: Hey, how-ya-doin?" I have patience. I attached it to one flange from inside the home, the other from underneath. Both ends were easier than expected. This is a quality product, but fragile as you might imagine. Be careful of it and it's tough enough and a good value.

### ⭐⭐⭐⭐ Ok and it worked, but thinner material.
*by C***E on April 18, 2025*

Needed to extend a register in the basement and this worked for the purpose. Much cheaper than alternatives, but the material is a little think and tears easier than a name brand product. Worked for my purpose, but just be careful when slipping over the fitting.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.sk/products/492832840-cuchiilo-5-inch-25-feet-insulated-flexible-duct-r4-2](https://www.desertcart.sk/products/492832840-cuchiilo-5-inch-25-feet-insulated-flexible-duct-r4-2)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-26*