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Guide

How to Mount the Wall Bracket and Drill the Wall Hole for a Mini-Split

Before you can hang your mini-split's indoor unit, you need to mount the wall bracket in the right spot and drill a clean hole through to the outside. This quick walkthrough shows exactly where to place it and how to get through the wall without hitting trouble.

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In this video

  • Remove the wall-mount bracket from the back of the indoor unit before you start (it's only attached for shipping).
  • Always mount the bracket on an outside wall so condensate can drain straight through and out, avoiding the need for a condensate pump.
  • Airspool units let you offset the wall hole 7 1/4 inches left or right of the bracket's mounting screw.
  • Drill a small pilot hole first and visually inspect from outside to confirm you're clear of electrical, gas, and utility meters before committing to the full-size hole.
  • Use a 2.5-inch spider bit for the final hole, and make sure the bracket is level before you drill so the indoor unit doesn't hang crooked.

Questions this video answers

Do I need to remove the mounting bracket from the mini-split before installing it?

Yes. The bracket ships attached to the indoor unit with a single screw just for shipping purposes. You need to remove it first, then mount it separately on the wall before hanging the indoor unit on it.

Should the mini-split wall bracket go on an inside or outside wall?

Mount it on an outside wall whenever possible. This lets the condensate line run straight through the wall and drain outside. If you use an inside wall instead, you'll need to add a condensate pump, which is more work and complexity.

How far from the mounting screw should I drill the wall hole for a mini-split?

On this Airspool unit, you can drill the wall penetration either 7 1/4 inches to the left or 7 1/4 inches to the right of the bracket's mounting screw, whichever side gives you a clearer path through the wall.

What size drill bit do I need for a mini-split wall penetration?

Start with a half-inch or smaller bit to drill a pilot hole so you can visually check the location from outside. Once you confirm it's clear, switch to a 2.5-inch spider bit to cut the final hole for the line set and drain.

How do I make sure I'm not drilling into electrical or gas lines?

Drill a small pilot hole first, then go outside and visually inspect the area around it before enlarging the hole. Check that you're not near electrical wiring, gas lines, or utility meters before switching to the larger bit.

Why does the wall bracket need to be level?

If the bracket isn't level when you mount it, the indoor unit will hang crooked once it's installed on the bracket. Take the time to level it before drilling so the finished installation looks right.

Transcript

Read the full transcript

For mounting this bracket, the first thing you need to realize is that it's screwed onto the indoor unit. There's one screw that normally holds this bracket onto the indoor unit, and that's just for shipping purposes. You want to remove the bracket and then figure out where you're going to put it on an outside wall of your home, garage, etc.

Why an outside wall? Because you need to make sure the condensate goes through the wall and outside. You could potentially do it on an inside wall, but then you'd need a condensate pump, and it's a lot more work. So ideally, pick an outside wall. For this particular Airspool unit, you can choose to be seven and a quarter inches to the left of this screw, or seven and a quarter inches to the right of it.

The first thing you want to do is find a bit, half inch or smaller, to drill through the wall, and make sure you're not near any electrical, gas, etc. that's going to be disruptive when you haul out this bad boy and start drilling big holes through the wall. Do a visual inspection first to make sure you're not near utility meters, etc. before drilling holes through your wall.

We're not going to actually do it here, but you're going to drill that pilot hole and visually inspect to make sure it looks okay, and then switch out your bit. We like this spider bit — the two and a half inch bit does wonders for getting through your wall in a hurry. Also notice that we leveled this out. It goes without saying that if you don't level this bracket out in the beginning, you're going to have a crooked indoor unit later on, which is not a good look.

Written by Airspool Team

The crew that designs, tests, and ships every Airspool unit. We write the guides we wish we'd had when we started — plain-English, DIY-first, and honest about the tradeoffs.

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