---
product_id: 186950880
title: "Flex-Vent KM Flexible Insulated Duct- 4\" Diameter"
brand: "thermaflex"
price: "€ 149.38"
currency: EUR
in_stock: false
url: https://www.desertcart.hr/products/186950880-flex-vent-km-flexible-insulated-duct-4-diameter
store_origin: HR
region: Croatia
---

# Velocity: 5000 FPM Pressure Rating: 10 in WG Temp Range: -20 to 250°F Flex-Vent KM Flexible Insulated Duct- 4" Diameter

**Brand:** thermaflex
**Price:** € 149.38
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Elevate Your Airflow Game!

## Quick Answers

- **What is this?** Flex-Vent KM Flexible Insulated Duct- 4" Diameter by thermaflex
- **How much does it cost?** € 149.38 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/186950880-flex-vent-km-flexible-insulated-duct-4-diameter)

## Best For

- thermaflex enthusiasts

## Why This Product

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

## Key Features

- • **Flexible Design:** Easily adapts to various installations, making it a versatile choice for professionals.
- • **Durable Insulation:** Engineered for longevity, providing reliable performance in demanding conditions.
- • **High Velocity Airflow:** Achieves an impressive 5000 FPM, maximizing efficiency in any setup.
- • **Extreme Temperature Tolerance:** Withstands temperatures from -20°F to 250°F, perfect for diverse environments.
- • **Unmatched Pressure Performance:** Handles up to 10 inches of positive pressure, ensuring optimal airflow.

## Overview

The Flex-Vent KM Flexible Insulated Duct is a high-performance solution designed for professionals seeking reliable airflow management. With a robust pressure rating, extreme temperature tolerance, and high velocity capabilities, this duct is engineered to meet the demands of any HVAC system while ensuring flexibility and durability.

## Description

Strong polyester film laminated and encapsulating a heavy, corrosion resistant steel wire helix, forms the inner core and supports a thick blanket of fiberglass insulation. The outer vapor barrier is a new bi-directional reinforced metallized vapor barrier which will not unravel. The smooth air tight inner core of polyester is designed for low to medium pressure systems.

## Features

- Pressure Rating: (WG)
- Positive: 10 Inches (4"-16" ID) 6 Inches (18"-20" ID)
- Negative: 1/2 Inch (4"-20" ID)
- Velocity: 5000 FPM
- Temp Range: -20 - 250 Farenheit

## Product Details

- **Brand:** Thermaflex
- **Item Weight:** 6.7 Pounds
- **Manufacturer:** Thermaflex

## Images

![Flex-Vent KM Flexible Insulated Duct- 4" Diameter - Image 1](https://m.media-amazon.com/images/I/21PkaSusshL.jpg)

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**Shop now:** [https://www.desertcart.hr/products/186950880-flex-vent-km-flexible-insulated-duct-4-diameter](https://www.desertcart.hr/products/186950880-flex-vent-km-flexible-insulated-duct-4-diameter)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-24*