---
product_id: 120218499
title: "DuctlessAire Insulated Copper Twin Line Set for Ductless Mini Split Air Conditioner and Heat Pump System - Insulation Copper Pipe Coil Tubing for HVAC, AC & More - Universal Cover (25ft, 1/4 x 3/8 in)"
brand: "ductlessaire"
price: "NT$11209"
currency: TWD
in_stock: true
reviews_count: 8
url: https://www.desertcart.tw/products/120218499-ductlessaire-insulated-copper-twin-line-set-for-ductless-mini-split
store_origin: TW
region: Taiwan
---

# Integrated condensate drain wire for moisture control 3/8" thick closed-cell PE insulation for max energy efficiency Pre-flared brass nuts for tool-free install DuctlessAire Insulated Copper Twin Line Set for Ductless Mini Split Air Conditioner and Heat Pump System - Insulation Copper Pipe Coil Tubing for HVAC, AC & More - Universal Cover (25ft, 1/4 x 3/8 in)

**Brand:** ductlessaire
**Price:** NT$11209
**Availability:** ✅ In Stock

## Summary

> 💨 Upgrade your HVAC game with effortless efficiency!

## Quick Answers

- **What is this?** DuctlessAire Insulated Copper Twin Line Set for Ductless Mini Split Air Conditioner and Heat Pump System - Insulation Copper Pipe Coil Tubing for HVAC, AC & More - Universal Cover (25ft, 1/4 x 3/8 in) by ductlessaire
- **How much does it cost?** NT$11209 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/120218499-ductlessaire-insulated-copper-twin-line-set-for-ductless-mini-split)

## Best For

- ductlessaire enthusiasts

## Why This Product

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

## Key Features

- • **Durable Copper Core:** ASTM B280 certified copper tubing ensures long-lasting thermal performance
- • **Moisture Management:** Built-in condensate drain wire keeps your system dry and efficient
- • **Effortless Installation:** Pre-flared brass nuts eliminate extra fittings and speed up setup
- • **Energy-Smart Insulation:** Thick closed-cell PE shell slashes heat transfer and condensation
- • **Universal HVAC Compatibility:** Fits most mini split AC and heat pump systems with 1/4" x 3/8" tubing

## Overview

The DuctlessAire 25ft Insulated Copper Twin Line Set is a premium HVAC accessory featuring ASTM B280 certified copper tubing and 3/8" thick closed-cell polyethylene insulation. Designed for universal compatibility with mini split air conditioners and heat pumps, it includes pre-flared brass nuts for quick installation and an integrated condensate drain wire to manage moisture, ensuring optimal system performance and energy conservation.

## Description

Full description not available

## Features

- COPPER TUBING FOR PERFORMANCE: DuctlessAire’s 25ft Mini Split Line Set features copper tubing designed for air conditioning and heat pump systems. It complies with ASTM B280 standards, ensuring compatibility with air conditioning and refrigeration applications. The copper construction supports efficient thermal performance for heating and cooling, helping to maintain effective system operation over time.
- INSULATION FOR ENERGY CONSERVATION: The line set comes with white polyethylene (PE) hard shell insulation that has a 3/8" thickness. Its closed-cell structure helps reduce heat transfer, promoting the HVAC system's efficiency. This insulation also helps minimize condensation, ensuring the system operates effectively in varying environmental conditions while supporting energy conservation efforts.
- EASY INSTALLATION WITH PRE-FLARED LINES: This line set includes pre-flared brass nuts on both ends, making installation straightforward. The pre-flared design eliminates the need for additional fittings or tools, ensuring easy and secure connections between the indoor and outdoor units. This feature simplifies the installation process, saving time while maintaining a reliable and secure connection.
- CONDENSATE DRAIN WIRE FEATURE: This 25ft line set is equipped with a condensate drain wire that helps manage moisture during system operation. The 25ft length provides ample reach for installation, ensuring proper moisture management across a wider area. This feature directs excess moisture away from the system, supporting smooth operation and helping maintain the system's performance in various weather conditions.
- COMPATIBLE WITH HVAC SYSTEMS: The DuctlessAire 25ft Mini Split Line Set is compatible with most mini split air conditioners and heat pump systems. With dimensions of 1/4 x 3/8 inches, it is designed to integrate with a variety of HVAC setups. The copper tubing and insulation ensure reliable operation, making it suitable for different installations, both residential and commercial, to meet varying performance needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | DuctlessAire |
| Material | Copper |
| Color | Black |
| Product Dimensions | 300"L x 0.25"W |
| Outside Diameter | 0.25 Inches |
| Item Length | 300 Inches |
| UPC | 627144103260 758149825786 |
| Manufacturer | DuctlessAire |
| Part Number | D141238-25 |
| Item Weight | 7.54 pounds |
| Item model number | D141238-25 |
| Is Discontinued By Manufacturer | No |
| Size | 1/4" x 3/8" |
| Shape | Tumblers |
| Power Source | Corded Electric |
| Voltage | 100 Volts |
| Installation Method | Split system |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** DuctlessAire
- **Material:** Copper
- **Color:** Black
- **Product Dimensions:** 300"L x 0.25"W
- **Outside Diameter:** 0.25 Inches
- **Item Length:** 300 Inches
- **UPC:** 627144103260 758149825786
- **Manufacturer:** DuctlessAire

## Images

![DuctlessAire Insulated Copper Twin Line Set for Ductless Mini Split Air Conditioner and Heat Pump System - Insulation Copper Pipe Coil Tubing for HVAC, AC & More - Universal Cover (25ft, 1/4 x 3/8 in) - Image 1](https://m.media-amazon.com/images/I/815RkfzaGJL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Hard to go wrong
*by S***I on June 4, 2020*

When a product is done right for the task; it's really hard for it to be wrong. This is a line-set designed for mini-split AC/HP applications & there's nothing wrong with it, whatsoever. It is exactly what I expected it to be.I will say (should anyone be wondering) that the fittings are the heavier-duty style and much less prone to splitting due to water leaching into the bell & freezing. The insulation on this type of line-set is easy to work with & to pull through holes than the old-school foam type, and since it's melded together, it really suits Mini-split installations.I was not expecting to be blown away, and I wasn't; but that said... there's nothing bad to say either.Good product, packed right, shipped fairly quickly, and matched it's purpose quite well. It was just as advertised, and I had no issues. Overall, nothing bad to say > good review!

### ⭐⭐⭐⭐⭐ As expected
*by R***I on September 29, 2024*

Good product

### ⭐⭐⭐⭐ Works well as a replacement
*by K***N on August 24, 2024*

I bent the one that came with my ductless air mini split. The only real difference is the factory one has an offset to hook up to the indoor unit. This one does not

## Frequently Bought Together

- DuctlessAire - Insulated Copper Twin Coil Mini Split Line Set - HVAC & AC Hose, Indoor/Outdoor Use - Air Conditioning Accessories - 25 Ft (1/4 x 3/8 inches)
- Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack)
- 2Pieces Copper Pipe Extension Joint Connectors for Air Conditioning Pipe Coupling Adapters with Flare Nuts and Connectors for Copper Tube Diameter 3/8 and 1/4-Inch

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-14*