---
product_id: 203487574
title: "Hon&Guan 4 Inch Insulated Flexible Duct - 4 FT Noise Reducer Heavy-Duty Four Layer Protection Hose, Insulated Duct for Exhaust Fan Insulation, Heating & Cooling Ventilation, Black"
brand: "hon&guan"
price: "€ 58.06"
currency: EUR
in_stock: true
reviews_count: 8
category: "Hon&Guan"
url: https://www.desertcart.it/products/203487574-hon-and-guan-4-inch-insulated-flexible-duct-4-ft
store_origin: IT
region: Italy
---

# 50% noise reduction Thermal range -22°F to 302°F 4-layer heavy-duty protection Hon&Guan 4 Inch Insulated Flexible Duct - 4 FT Noise Reducer Heavy-Duty Four Layer Protection Hose, Insulated Duct for Exhaust Fan Insulation, Heating & Cooling Ventilation, Black

**Brand:** hon&guan
**Price:** € 58.06
**Availability:** ✅ In Stock

## Summary

> 🖤 Upgrade your airflow game with the ultimate insulated duct—quiet, cool, and built tough!

## Quick Answers

- **What is this?** Hon&Guan 4 Inch Insulated Flexible Duct - 4 FT Noise Reducer Heavy-Duty Four Layer Protection Hose, Insulated Duct for Exhaust Fan Insulation, Heating & Cooling Ventilation, Black by hon&guan
- **How much does it cost?** € 58.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/203487574-hon-and-guan-4-inch-insulated-flexible-duct-4-ft)

## Best For

- hon&guan enthusiasts

## Why This Product

- Trusted hon&guan brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Four-layer heavy-duty design with PVC, aluminum foil, and glass wool resists wear, pets, and corrosion.
- • **Whisper-Quiet Operation:** Cut noise by up to 50% with advanced glass wool absorption for a peaceful environment.
- • **Boost Your HVAC Efficiency:** Insulated duct keeps exhaust cool, improving AC performance and reducing energy waste.
- • **Extreme Temperature Resilience:** Handles from -22°F to 302°F, perfect for heating, cooling, and ventilation needs.
- • **Versatile Pro-Grade Application:** Ideal for kitchens, grow rooms, bathrooms, and more—engineered for professional-grade airflow.

## Overview

The Hon&Guan 4 Inch Insulated Flexible Duct is a 4-foot heavy-duty hose featuring a four-layer construction with PVC, aluminum foil, and glass wool insulation. It reduces noise by up to 50%, withstands temperatures from -22°F to 302°F, and prevents damage from pets and corrosion. Designed for HVAC systems, it enhances portable AC efficiency and is suitable for diverse ventilation applications.

## Description

Hon&Guan 4 Inch Insulated Flexible Duct - 4 FT Noise Reducer Heavy-Duty Four Layer Protection Hose, Insulated Duct for Exhaust Fan Insulation, Heating & Cooling Ventilation, Black - desertcart.com

Review: Huge improvement over regular duct - Purchased for a portable AC exhaust hose replacement. Works GREAT! Gets barely warm to the touch, when the old exhaust hose was extremely hot and radiating heat back into the room. AC is a little quieter too. Can't recommend this insulated duct highly enough, I can't believe I had been undermining my AC's efficiency for years with a non-insulated exhaust duct. The duct itself feels very well-made, each end has a short length of reinforced foil which fits under the included hose clamps perfectly. Insulated outer duct begins a few inches later, and the outer duct material feels very durable and flexible. The inner duct acts as the support and the outer duct holds the insulation in place, and the result is a dramatic drop in outer duct temp. AC has been running for a few hours now the outer duct is no hotter. I think we have a winner.
Review: Excellent Upgrade for Portable Air Conditioner - The stock hoses for my portable (two-hose!) air conditioner had disintegrated, and I've long been considering buying a set of insulated hoses for it ever since I bought the unit. I'm honestly surprised that they were not insulated at all out of the box. As such, I bought two of these hoses in 6"x8'. Installing them onto the original hose adapters was a bit of a task, entailing very liberal application of duct tape. This done, I connected them up and powered the unit up. I did not buy these hoses with the intent of being quiet, but I was honestly and pleasantly surprised by how much quieter the condenser side fan was now. I can barely hear it anymore, and it quickly subsides under the sound of the compressor once pressure builds. With the original hoses, it was easily the loudest part of the entire air conditioner. I cannot measure the thermal performance directly versus the original hoses, due to the original hoses having disintegrated years ago as of me writing this review. However, I can definitely say that, before, it was actually hot behind the unit. With these, it's significantly cooler, and the unit's performance has significantly improved. It can now actually cool my garage! Something it used to struggle with. The hoses have also survived from a durability standpoint significantly better than the original plastic hoses. Although they ARE a little less convenient to store when the air conditioner's not in use thanks to their bulk. That's the only "negative", other than the admittedly improvised installation, that I can even say about them. Final Answer: If you have a portable air conditioner and use it with any regularity, upgrade it to insulated hose(s) now. You will not regret it.

## Features

- Noise Reducer&Absorption：The internal structure of glass wool is fluffy and the overall density is large, noise can be reduced by allowing some of the sound waves to escape through the holes rather than reflecting, can decrease the noise by up to 50%
- Thermal Insulation：This Flex Duct is intended to be used in heat preservation, cooling, ventilation, with a good thermal insulation performance, works well with your portable ac device, temperature endurance range from -22°F ~ 302 °F (-30℃ ~ 150℃)
- Four Layer Protection：Heavy-duty four layer protection design, 1 * PVC+2 * aluminum foil+1 * centrally glass wool with 2 clamps, and the outermost layer of this insulated flexible duct can prevents cute “pets” from biting and breaking
- Anti-Corrosion & Durable：Thick layer of PVC&2 layers of Aluminum on this flexible ducting prevents gas leaks effectively. Works with extractor and exhaust inline duct fans, carbon filters, also be used as a boat blower hose
- Variety of Applications：Hon&Guan insulated flexible duct is suitable for HVAC system. It will move and deliver air in Kitchens (cooking exhaust), Green Houses and Grow Rooms (Air Circulation, Intake, Exhaust and Light Fixture Cooling), Bathrooms (Smell and Moisture Exhaust), Dryer Rooms, Grow Tents and other applications etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Hon&Guan |
| Color | Black |
| Material | Aluminum , PET, PVC |
| Maximum Pressure | 2500 Pascal |
| Nominal Wall Thickness | 25 millimeters |
| Outside Diameter | 4 Inches |

## Images

![Hon&Guan 4 Inch Insulated Flexible Duct - 4 FT Noise Reducer Heavy-Duty Four Layer Protection Hose, Insulated Duct for Exhaust Fan Insulation, Heating & Cooling Ventilation, Black - Image 1](https://m.media-amazon.com/images/I/71u--CpP7BL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Huge improvement over regular duct
*by M***. on July 14, 2024*

Purchased for a portable AC exhaust hose replacement. Works GREAT! Gets barely warm to the touch, when the old exhaust hose was extremely hot and radiating heat back into the room. AC is a little quieter too. Can't recommend this insulated duct highly enough, I can't believe I had been undermining my AC's efficiency for years with a non-insulated exhaust duct. The duct itself feels very well-made, each end has a short length of reinforced foil which fits under the included hose clamps perfectly. Insulated outer duct begins a few inches later, and the outer duct material feels very durable and flexible. The inner duct acts as the support and the outer duct holds the insulation in place, and the result is a dramatic drop in outer duct temp. AC has been running for a few hours now the outer duct is no hotter. I think we have a winner.

### ⭐⭐⭐⭐⭐ Excellent Upgrade for Portable Air Conditioner
*by J***H on September 18, 2021*

The stock hoses for my portable (two-hose!) air conditioner had disintegrated, and I've long been considering buying a set of insulated hoses for it ever since I bought the unit. I'm honestly surprised that they were not insulated at all out of the box. As such, I bought two of these hoses in 6"x8'. Installing them onto the original hose adapters was a bit of a task, entailing very liberal application of duct tape. This done, I connected them up and powered the unit up. I did not buy these hoses with the intent of being quiet, but I was honestly and pleasantly surprised by how much quieter the condenser side fan was now. I can barely hear it anymore, and it quickly subsides under the sound of the compressor once pressure builds. With the original hoses, it was easily the loudest part of the entire air conditioner. I cannot measure the thermal performance directly versus the original hoses, due to the original hoses having disintegrated years ago as of me writing this review. However, I can definitely say that, before, it was actually hot behind the unit. With these, it's significantly cooler, and the unit's performance has significantly improved. It can now actually cool my garage! Something it used to struggle with. The hoses have also survived from a durability standpoint significantly better than the original plastic hoses. Although they ARE a little less convenient to store when the air conditioner's not in use thanks to their bulk. That's the only "negative", other than the admittedly improvised installation, that I can even say about them. Final Answer: If you have a portable air conditioner and use it with any regularity, upgrade it to insulated hose(s) now. You will not regret it.

### ⭐⭐⭐⭐ Excellent for RV diesel heater hose
*by T***R on November 26, 2025*

Pros: Overall quality and ease of installation. Insulation is thick. Cons: The inner foil is thin, which made connecting it with the hose clamps a challenge without tearing it. This would hands down be a 5-start if the inner foil were thicker.

## Frequently Bought Together

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-26*