Mini Split Line Set Cover Buying Guide

How to Pick the Perfect Line Set Cover

Mini split line set covers conceal the unsightly refrigerant/drain lines and wiring connecting your indoor and outdoor unit. Installing a line set cover makes your installation look professional and clean. It also protects your lines and wiring from exposure to the elements, including UV rays, which can break down insulation over time.

As an added benefit, line set covers are paintable, so you can match the color of your siding and preserve your home's decor.

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Line Set Cover Parts

The illustration below depicts the most common pieces in a typical mini split line set cover installation.

Line Set Cover Components

1. Horizontal Elbow: Used to turn on the installation wall to avoid obstacles such as windows, etc.

2. Split Line Tube: Conceals and protects the line set, drain tubing, and connecting wire from the elements

3. NR - End Socket: Used to seal the line set cover at the condenser

4. Vertical Elbow: Used to turn into or away from the wall of installation (Go around corners, under soffits, etc.)

5. Socket/Coupling: Used to connect two split line tubes (CD) in a straight run

6. Wall Cover: Used to seal around a wall penetration

Line Set Cover Sizing

Line set covers come in several sizes. The sizing chart below will help you quickly find the cover that is correctly sized for your application. It shows how many line sets of a particular size will fit into each diameter cover.

Cover Size	# of 1/4" x 3/8" Line Sets	# of 1/4" x 1/2" Line Sets	# of 1/4" x 5/8" Line Sets	# of 3/8" x 5/8" Line Sets
3" (Mitsubishi CD-75) (Fortress LD92)	1	1	1	0
4" (Mitsubishi CD-100) (Fortress LD122)	2	2	1	1
6" (Mitsubishi CD-140)	3	3	2	2
Note: 1 Line Set = 1 Suction and Liquid Line, Drain Tubing, and Communication Cable.

Common Line Set Covers

Below are links to the most common line set cover pieces for basic applications.


Mitsubishi Models	Mitsubishi Models	Mitsubishi Models	Mitsubishi Models	Mitsubishi Models	Mitsubishi Models
CD-75	NR-75	NE-75	NC-75	NS-75	NW-75
CD-100	NR-100	NE-100	NC-100	NS-100	NW-100
CD-140	NR-140	NE-140	NC-140	NS-140	NW-140
Fortress Models	Fortress Models	Fortress Models	Fortress Models	Fortress Models	Fortress Models
LD92	LEN92	LK92	LCO92	LJ92	LW92
LD122	LEN122	LK122	LCO122	LJ122	LW122

Specialized Line Set Covers

The following specialized line set covers are designed for more complex installations with unique needs.

	NY - Simple Wall Cover Used to seal around wall penetrations. We recommend NW instead, as it is easier to install. Available Sizes Mitsubishi: NY-75, NY-100, NY-140 Fortress: LW92, LW122
	NX - Universal Horizontal Elbow Used to create angles between 45° to 90° on the installation wall. Available Sizes Mitsubishi: NX-75, NX-100, NX-140 Fortress: LKA92, LKA122
	NZ - Universal Vertical Elbow Used to create angles between 45° to 90° into or away from the installation wall. Available Sizes Mitsubishi: NZ-75, NZ-100, NZ-140 Fortress: LCA92, LCA122
	NM - 45° Horizontal Elbow Used to create angles of 45° on the installation wall. Available Sizes Mitsubishi: NM-75, NM-100, NM-140 Fortress: LKF92, LKF122
	NU - 45° Vertical Elbow Used to create angles of 45° into or away from the installation wall. Available Sizes Mitsubishi: NU-75, NU-100, NU-140 Fortress: LCFO92, LCFO122
	NK - Wall Entry Fitting Used to seal the penetration when the line set runs perpendicular to the entry wall. Available Sizes Mitsubishi: NK-75, NK-100, NK-140 Fortress: LWF92, LWF122
	NT - T-Joint Used to split the path of a line-hide installation. Available Sizes Mitsubishi: NT-75, NT-100, NT-140 Fortress: LT92, LT122
	NA - Corner Cap/Soffit Entry Fitting Used to seal around the penetration in the soffit. Available Sizes Mitsubishi: NA-75, NA-100, NA-140 Fortress: LP92, LP122
	NF - Flexible Joint Used to connect segments for unique applications. Available Sizes Mitsubishi: NF-75, NF-75M, NF-100, NF-140 Fortress: (1) LF92 + (2) LFJ92, (1) LF122 + (2) LFJ122

See more options from Mitsubishi
See more options from Fortress

Line Set Cover FAQs

Here are some common questions we get about line set covers.

Why should I install line set covers?

Line set covers can protect your sensitive mini split lines and wiring from UV and fire damage. They are made of high-quality PVC with UV inhibitors for outdoor service in all weather conditions.

Enclosing the lines also creates a cleaner look and improves curb appeal. They sit flush with the wall, eliminating insect or bird nests that could form in the gap.