Delivering home comfort from our family to yours since 1967
Inquiries and Emergency Services
REQUEST A FREE QUOTE
REQUEST A SERVICE
Appleby Systems Logo
Inquiries and Emergency Services

Where to Install Ductless A/C: Recommended Wall Locations, Rooms & More

Posted on July 20, 2026
by Appleby Systems

White A/C Wall unit

When it comes to keeping your family cool and comfortable in the summer heat, nothing beats having a quality air conditioning system installed in your home. If you aren't set up for central cooling, mini-split systems have you covered, but you might be curious about where to install ductless AC.

In this article, we share our expert recommendations on the best locations and rooms to install mini-split ductless air conditioning. 

Why go with Ductless AC? 

As the name suggests, ductless AC doesn’t require the use of ductwork in your home, and as such is quick and easy to install while also offering other exciting benefits. Ductless AC is more energy-efficient than standard AC systems, it is environmentally friendly and customizable to meet your needs. You’ll get more consistent cooling and have the ability to cool specific zones for ultimate comfort.  

A ductless system delivers cooled air directly from the indoor heads (coils)and you need to determine where these will go before making any other plans. They should be placed in areas that will require the most cooling, for best results. 

Make Sure You Have Equal Air Distribution 

You want the ductless unit (head/coil) installed in a central location where air can be distributed evenly throughout the room. This usually means placing the ductless indoor unit (head/coil) 1 foot from the ceiling.  

It’s also important to install wall-mounted units so the filters can easily be reached. Aesthetically, you should try to position ductless unit (head/coil) so they don’t conflict with windows or clash with your interior. 

Ductless AC Should Only be Placed on Exterior Walls 

Ideally, you’ll want to install your indoor ductless unit (head/coil) only on exterior walls. This means a wall that leads directly to the outside on the other side and not to a different room in the house or a hallway. You can install the unit on an interior wall but that would entail opening finished walls.  

Outdoor A/C Wall Unit

Rules for The Outdoor AC Component 

Once you have your indoor air handler plans in place, you can decide where to position the outdoor unit. It’s important that the outdoor unit has a good amount of unhindered airflow and that there is a clear path for air leaving the house to vent outside. You’ll also want it to be easily accessible to HVAC technicians in case you need quick service. If possible, try to keep it out of direct sunlight and keep the unit itself off any soft groundideally on top of a cement foundation.  

Top Rooms for a Ductless AC

Ductless mini-split AC systems are perfect for spaces that lack ductwork or need independent temperature control. They save energy by cooling only the rooms you actually use.
Here are the best rooms to install a ductless AC:
  • Home additions – Avoids the high cost of extending central ductwork.
  • Master bedrooms – Keeps you cool at night without chilling the whole house.
  • Finished basements – Eliminates dampness and handles uneven temperatures.
  • Sunrooms – Combats heavy heat gain from large glass windows.
  • Home offices – Offsets heat from computers and keeps you comfortable while working.
  • Garage workshops – Turns unconditioned spaces into usable year-round work areas.

Install Ductless in Oakville & Burlington Today

Don't let the heat of the summer get you down. Getting a ductless air conditioner unit is as easy as giving the experts at Appleby Systems a call. Speak with one of our Oakville or Burlington advisors today to outfit your home with the best cooling system for your needs.

Appleby Systems Arrows
Serving Halton region Burlington & Oakville, Mississauga, Hamilton, Ancaster & Dundas since 1967
©2026 Appleby Systems. All Rights Reserved. | Privacy Policy | Sitemap
Web Design and SEO in the Greater Toronto and Hamilton Area by WEB ROI
tagsmartphonecrossmenu
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram