Make Up Air Systems (MUA)

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Make Up Air System (MUA) Installation

Simply stated, a make up air unit pulls air into your space from outdoors and conditions it to the indoor temperature, to replace air that's pulled out by your exhaust equipment. Without it, you get back drafting, poor temperature control, negative air pressure and air quality problems. They are also used to provide hallway pressurization in multi family buildings such as condos and apartments to ensure the air and smells from the various suites are not pulled into the hallways.

Weiss Johnson offers a full slate of service, repair and replacement options to ensure your building’s equipment is always operating efficiently and properly.


Brands of MUA We Install

Engineered Air


Parts of MUA We Replace

Blower Motors

Control Boards



Inducer Motors

Ignition Assemblies


Parts of MUA We Repair

Blower Motor Replacements

Control Boards

Ignition Assy Replacement

Controls Repairs

Control Boards

Gas Valve Replacement

Our Work

Emergency Service Available

We povide emergency service on all Make Up Air System Installation and repairs. For commercial expertise with on-time service, let Weiss-Johnson be your first choice.

Interested in a make up air system installation or maintenance?

Ready to go 24/7/365

Weiss-Johnson is Edmonton's 1st Choice for all your Heating, Air Conditioning and Plumbing needs.

Our certified technicians are available 24/7 year round to ensure that you can get help whenever that may be. Our team is committed to total customer satisfaction no matter what time of day it is.

What Our Customers Say About Us

"The guys were very friendly. They took lots of care and attention when removing the old furnace and replacing it with the new one to not damage anything along the way. Once finished they took the time to explain the operation and go through any questions we had. I would definitely use them again."

- Kyle J.


"This review is for Noel who came to my home to see why our electric air cleaner was not working. He was punctual and super friendly. Found the problem within 15 minutes. Had the part ordered, and 9 days later it literally only took him 3 minutes to replace it for us!"

- Joy H.


"Booking an appointment for a furnace checkup was a very quick and simple phone call. The technician was on time as promised, very knowledgeable and professional. It gave us piece of mind that our 10 year old furnace was in good working order."

- Nicolas L.