Make-Up Air Unit Services

Experts In Installation, Maintenance and Repair

The Make-Up Air Unit Experts 

For over 50 years we have been installing, maintaining and repairing make-up air units across the Midwestern United States. With 7 locations, and over 200 employees, Rasmussen Mechanical has wide-ranging expertise working in both commercial and industrial facilities. Our MAU solutions include:

– Equipment Sizing and New Installation

– Emergency Service  and Repair

– Maintenance Agreements 

– Inspection and Testing

– MAU Parts 

We Can Help!

Tech standing next to installed Makeup Air Unit


Our technicians are factory-trained experts who understand the intricacies of engineering and service work. Our make up air unit experts can provide timely and professional guidance for both you and your company. With a commercial and industrial department, their is no job too big or too small for our team.

  • 24/7 Emergency Services Available and Technical Support
  • Ground Up Design and Installation
  • Dedicated Project Managers
  • Over 10,000 Parts In Stock

Commercial And Industrial Services. Call Today:


All Things Make-Up Air

With a commercial and and an industrial HVAC team, there is no make-up air project too big or too small. From commercial kitchen make up air units to industrial make up air systems, we can help get your project moving from start to finish.  We attempt to repair your existing unit whenever possible. Some signs that your unit may need a repair are:

◉ Negative Air Pressure Or Suction Pressure At Exterior Doors

Poor Indoor Air Quality And Under performing Exhaust Hoods

◉ Spikes In HVAC System Energy Usage 

◉ Uncomfortable Temperature And Humidity 

Rasmussen Mechanical Service Technicians Installing Commercial Ducting

The Rasmussen Mechanical Difference 

At Rasmussen Mechanical we committed to providing an exceptional customer experience. We strive to build a lasting partnership with you and your company. As a one stop shop for all of your mechanical equipment needs we can ensure all components of your facility are operating efficiently and safely.

Let’s Talk!


We Can Help!

Make Up Air Unit Installation

Let the experts at Rasmussen Mechanical help with your make up air unit replacement. We can perform the removal and installation of new MAU. Installation will vary depending on size and type but here are a few common installation practices:

• System Evaluation And Appropriate Unit Sizing

• Site Prep And Removal Of Existing Unit

• Place MAU Correctly On Foundation

• Install System Piping

• Perform Unit Start-Up

Call The Experts Today At


Check Out Our Latest HVAC Blog Articles

Exhaust Fan

Exhaust Fan Repair And Maintenance 

Exhaust fan issues commonly present themselves as loud noises while operating, complaints of spaces being to hot or sudden suction drops. Ensuring your exhaust fan is working properly allows fumes to leave the area and ensure the safety of those in the space.

Commercial HVAC Maintenance Checklist

“HVAC” is a broad term used to describe all sorts of mechanical equipment. So, we will cover some of the most common pieces of HVAC equipment found in commercial facilities. In this article we provide the general know how for common commercial HVAC maintenance issues.

Maintenance Case Studies

Do you know how large the financial payback can be for a good maintenance strategy? In this article we look at a maintenance case study done by the US Department Of Energy, the Building Owners and Managers Association, The New Building Institute and The U.S. Department of Energy Operations and Maintenance.