How to Cover Mini Split Lines: A Comprehensive DIY Guide

Covering mini-split lines is a crucial step in maintaining the aesthetic appeal and protecting the integrity of your HVAC system. Whether you have exposed lines or they are running through a wall, this comprehensive guide will walk you through the process of properly covering your mini-split lines, ensuring a seamless and professional-looking installation.

Measure and Select the Appropriate Line Set Cover

The first step in covering your mini-split lines is to accurately measure the diameter of the lines. Line set covers are available in a range of sizes, typically ranging from 1/2 inch to 1 1/2 inches in diameter. It’s essential to choose a cover that fits your lines snugly to ensure a secure and tidy installation.

When selecting a line set cover, you’ll also need to consider the material. The most common options include:

  1. Plastic Line Set Covers: These are the most affordable choice and come in a variety of colors to match your home’s aesthetic.
  2. Aluminum Line Set Covers: Offering a more durable and long-lasting solution, aluminum covers are a popular choice for their corrosion-resistance and sleek appearance.
  3. Copper Line Set Covers: The most premium option, copper line set covers provide a luxurious and high-end look, but come at a higher price point.

Carefully measure the length of your mini-split lines to determine the appropriate size of the line set cover. Typical line set covers are available in 5-foot or 10-foot lengths, so be sure to select a size that will accommodate your specific installation.

Determine the Optimal Location for the Line Set Cover

how to cover mini split linesImage source: Flickr

The placement of the line set cover is crucial to ensure proper airflow and accessibility. Ideally, the cover should be installed close to the outdoor unit, but not too close as to obstruct the airflow. Consider the overall layout of your outdoor space and choose a location that balances functionality and aesthetics.

Conceal Exposed Mini-Split Lines

If your mini-split lines are exposed, a line set cover can be an effective solution to conceal them. There are two primary types of line set covers to consider:

  1. Surface-Mounted Line Set Covers: These covers are designed to be attached directly to the wall or surface, making them a straightforward and easy-to-install option.
  2. Flush-Mounted Line Set Covers: These covers are designed to be recessed into the wall, providing a more seamless and integrated appearance. However, this option may require cutting a hole in the wall to accommodate the cover.

Carefully measure the dimensions of your line set and select the appropriate cover that suits your needs and preferences.

Protect Mini-Split Lines Running Through a Wall

When your mini-split lines are running through a wall, a line set cover can help protect them from potential damage. In this scenario, you’ll need to install a PVC mounting board to provide a flat support for the upper cap of the line set cover where the lines exit the wall.

To ensure a proper seal and prevent water leakage, use high-quality flashing tape and metal flashing material around the line set cover’s exit point. This step is crucial to maintain the integrity of your wall and prevent any moisture-related issues.

Secure the Line Set Cover

Depending on the type of line set cover you’ve chosen, the installation process will vary slightly.

For surface-mounted line set covers, you can attach them to the wall using screws or a high-quality adhesive. Be sure to seal any gaps between the cover and the wall to prevent air and water infiltration.

If you’re using a flush-mounted line set cover, you’ll need to cut a hole in the wall to accommodate the cover. Measure the size of the cover accurately before cutting the hole to ensure a proper fit.

Finish with a Seamless Appearance

Once the line set cover is installed, you can paint it to match the color of your home. This step will help to conceal the lines and enhance the overall aesthetic appeal of your outdoor unit. Use acrylic latex paint to ensure durability and resistance to weathering.

By following these steps, you can effectively cover your mini-split lines, creating a clean and cohesive look that complements your home’s exterior. Remember to take precise measurements, choose the right materials, and pay attention to the details to achieve a professional-grade result.


  1. Line Set Cover Installation For Multi Zone Mini Split Systems – YouTube
  2. Sealing Minisplit Line Set Penetration in Siding – GreenBuildingAdvisor
  3. How Should I Reuse or Replace this Ductless Lineset Cover? – DIY Stack Exchange