---
product_id: 449021282
title: "CUCHIILO Insulated Duct 4Inch 25Feet"
brand: "cuchiilo"
price: "$201.92"
currency: USD
in_stock: null
reviews_count: 13
category: "Cuchiilo"
url: https://www.desertcart.ec/products/449021282-cuchiilo-insulated-duct-4inch-25feet
store_origin: EC
region: Ecuador
---

# Up to 85% noise reduction with glass wool core R-4.2 insulation rating for superior thermal resistance 4-inch diameter for versatile HVAC fit CUCHIILO Insulated Duct 4Inch 25Feet

**Brand:** cuchiilo
**Price:** $201.92
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Upgrade your airflow game with Cuchiilo’s sleek, silent, and super-insulated duct! 🛠️

## Quick Answers

- **What is this?** CUCHIILO Insulated Duct 4Inch 25Feet by cuchiilo
- **How much does it cost?** $201.92 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/449021282-cuchiilo-insulated-duct-4inch-25feet)

## 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

- • **Quiet Comfort:** Fluffy glass wool core absorbs sound, slashing noise by up to 85% for a peaceful environment.
- • **Durable & Resistant:** Thick aluminum foil and spiral steel wire resist heat, acids, and flames—built to last.
- • **Effortless Flexibility:** Bend and shape without rigid elbows—perfect for complex HVAC layouts.
- • **Premium Thermal Shield:** R-4.2 Owens Corning glass wool insulation keeps your system energy-efficient year-round.
- • **Universal HVAC Compatibility:** Ideal for fresh air ventilation, central AC, and mechanical recovery systems without corrosive gases.

## Overview

The Cuchiilo 4 Inch Insulated Flexible Duct is a 25-foot HVAC duct featuring R-4.2 Owens Corning glass wool insulation for excellent thermal resistance and sound absorption. Constructed with thick aluminum foil and high-strength spiral steel wire, it offers durability, flame retardancy, and acid resistance. Its flexible design eliminates the need for rigid elbows, reducing wind resistance and simplifying installation across various ventilation systems.

## Description

Cuchiilo 4 Inch Insulated Flexible Duct,HVAC Insulation Duct,25 Feet Insulated Duct, 4 in Insulated Duct Hose, R4.2 Air Flexible Duct Aluminum Hose 4''25' Long,for HVAC Flex Ductowrk - desertcart.com

Review: It’s Ducting—And It Does Exactly What Ducting Should - Not much to say here: it’s 6" insulated flexible ducting, and it did the job perfectly. Easy to work with, solid insulation, and exactly what I needed for my project. Sometimes you just need something that works without any drama—and this delivered. Five stars!
Review: Tough Enough if you're careful - 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.

## Features

- 【🌿🛒High-quality performance 4 in 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%.
- 【🌿🛒4 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 4 in 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 | B09Y1JV2SV |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #27,065 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #32 in HVAC Ducting |
| Color | R-4.2 Insulation |
| Coverage | 10.47 square feet, R-4.2 |
| Customer Reviews | 4.3 4.3 out of 5 stars (250) |
| Date First Available | April 15, 2022 |
| Item Package Quantity | 1 |
| Item Weight | 5.32 pounds |
| Manufacturer | Cuchiilo |
| Material | Rubber |
| Product Dimensions | 300 x 4 x 0.04 inches |
| Size | 4 IN 25 FT |
| Thickness | 10.2 Centimeters |

## Product Details

- **Brand:** Cuchiilo
- **Item Thickness:** 10.2 Centimeters
- **Manufacturer:** Cuchiilo
- **Material:** Rubber
- **Product Dimensions:** 300"L x 4"W

## Images

![CUCHIILO Insulated Duct 4Inch 25Feet - Image 1](https://m.media-amazon.com/images/I/71WBnYiYrLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It’s Ducting—And It Does Exactly What Ducting Should
*by D***N on November 28, 2025*

Not much to say here: it’s 6" insulated flexible ducting, and it did the job perfectly. Easy to work with, solid insulation, and exactly what I needed for my project. Sometimes you just need something that works without any drama—and this delivered. Five stars!

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ GREAT VALUE
*by J***. on November 19, 2025*

WORKED GREAT

## Frequently Bought Together

- Cuchiilo 4 Inch Insulated Flexible Duct,HVAC Insulation Duct,25 Feet Insulated Duct, 4 in Insulated Duct Hose, R4.2 Air Flexible Duct Aluminum Hose 4''25' Long,for HVAC Flex Ductowrk
- EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm)
- Aluminum Foil Tape, 2 inch x 65 Feet (3.9 mil), Insulation Adhesive Metal High Temperature Heavy Duty HVAC Tape, Silver for Ductwork, Dryer Vent, HVAC

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-25*