
Make Up Air Unit Installation Sioux City
Proudly Serving Sioux City For Over 55 Years

For more than 55 years, Rasmussen Mechanical Services has provided professional make-up air unit installation in Sioux City and the surrounding area. We pride ourselves on being able to work on all makes and models of heating and cooling equipment and serve commercial and industrial facilities throughout the area.
Our installation experience spans a wide range of applications, including commercial kitchens, warehouses, manufacturing facilities, and large industrial spaces. With extensive experience in the commercial HVAC industry, we are experts in both commercial air conditioning and commercial heating systems.
CONTACT US
24/7 Service Number: 1-800-237-3141
Local Number:712-252-4613
Email:sales@rasmech.com
Address:2425 East 4th Street Sioux City, IA 51101
Office Hours: 7:00 – 4:00pm Monday through Friday

OUR MAKE-UP AIR INSTALLATION CAPABILITIES
- System Sizing
- Kitchen Make-Up Air
- Warehouse Ventilation
- Commercial HVAC Ventilation Installation
- Direct Fired Make-Up Air Units

TALK TO THE EXPERTS
Let the experts at Rasmussen Mechanical handle your make-up air unit replacement or new installation. Our team evaluates your facility to determine whether a new MAU installation will improve performance, comfort, and efficiency. We evaluate the flow rate of the make-up air to ensure it matches the exhaust rate and prevents negative pressure. In Sioux City's cold climate, installing a duct heater for the make-up air is recommended to warm incoming air before it enters the space. Units must be automatically controlled to start simultaneously with the exhaust system and include a motorized damper for closure when not in use.
SIOUX CITY'S HVAC EXPERTS
Our factory-trained technicians understand the engineering requirements behind properly designed make-up air systems. Whether you are installing a new unit or replacing aging equipment, our commercial and industrial teams ensure your system is sized, installed, and commissioned correctly. We specialize in servicing all major HVAC brands and equipment—including chillers, rooftop units, air handling units, boilers, heat pumps and building automation systems. We serve multiple cities and towns outside of the Sioux City area, including Sioux Falls, Elk Point, Vermillion, Le Mars and the surrounding area.
Serving the Sioux City since 1970
3rd Generation Family Owned Business
24/7 Emergency Service & Technical Support
Ground-Up Design and Installation
Dedicated Project Managers
Over 20,000 Parts In Stock
Local Reviews

“As always Rasmussen pulls through with the great work they do for our company. Highly recommend their service for your needs. Great guys to work with!”
– Simon Topete. Smithfield Foods, Sioux City Plant
“Jobs on Saturday were executed very nicely and successfully. Tell the team good job!”
– Thomas Gottschalk. WestRock Corrugating Division, Sioux City

SIOUX CITY MAKE UP AIR UNIT INSTALLATION FAQ
Can you install direct fired make-up air units?
Yes. Direct fired make up air units deliver a steady flow of fresh, tempered air, significantly improving indoor air quality and supporting proper ventilation. Our commercial HVAC services include expert installation, maintenance, and repair of direct fired make up air units, ensuring your business operates efficiently and meets all safety standards. Whether your facility is in South Sioux City, Sioux Falls or the surrounding area, our skilled technicians are trained to handle the complexities of these units. As your one-stop shop for commercial HVAC needs, we help you maintain a comfortable, compliant, and productive workspace.
Why hire a professional for MAU Installation?
Hiring a licensed HVAC contractor is crucial for make up air unit installation in commercial properties. Installing a makeup air unit in Sioux City involves understanding local codes and permits for any mechanical installation that alters or adds to a structure's HVAC system. When done right, proper installation of make up air units can improve energy efficiency and indoor air quality. When done incorrectly, you can increase energy usage by pumping more air than is needed into the space. Thermostats and zoning systems are also important for temperature control and energy savings in large buildings.

Is make-up air unit maintenance important?
Commercial HVAC systems, including heating equipment and heating systems, require maintenance for proper daily operations. Evaluating existing systems is a key part of the installation and maintenance process. Regular maintenance of make up air units is necessary to catch minor issues before they become costly repairs. We are committed to providing cost-effective solutions and back our work with a guarantee of quality service. Routine maintenance—including cleaning evaporator and heating coils, inspecting heating equipment and furnaces, and following a maintenance plan—prolongs system lifespan, reduces costs, and ensures optimal performance. While we don't serve residential clients, this allows us to be the experts on commercial and industrial projects.
How do I know if my building needs a make-up air unit?
If doors are hard to open, drafts are present, temperatures are inconsistent, or exhaust systems overpower your HVAC, your building may be under negative pressure. Commercial kitchens, warehouses, and facilities with high exhaust rates often require a make-up air unit to restore proper airflow balance.
WHY RAMSUSSEN MECHANICAL SERVICES?
We focus on improving indoor air quality, reducing energy costs, and optimizing the performance of your HVAC system. Our experienced technicians handle every aspect of the installation process, from balancing ventilation systems to installing ductwork, vents, and fans that fit your building’s unique layout and operational needs. We work closely with you to develop effective HVAC solutions that support your business goals, ensuring your heating and cooling systems operate efficiently and reliably. With our commitment to quality and customer satisfaction, you can trust us to deliver ventilation services that improve your building’s comfort and safety. As a local HVAC company we offers comprehensive commercial HVAC installation to businesses throughout Sioux City, and the surrounding areas.
MAKE-UP AIR UNIT INSTALLATION PROCESS
Installation requirements vary by unit type and facility, but common steps include:
-System evaluation and appropriate unit sizing.
-Site preparation and removal of existing equipment.
-Proper placement of the MAU on foundation or structure.
-Installation of gas, electrical, and ductwork connections, including installing ductwork in challenging locations and ensuring proper sealing to improve airflow and energy efficiency.
-System startup, testing, and airflow balancing, with a focus on control systems such as automatic controls and motorized dampers to ensure the unit operates in sync with the exhaust system and closes when not in use.
After installation, it is important to evaluate the system and schedule routine maintenance to catch minor issues before they become costly repairs.
SCHEDULE YOUR SERVICE TODAY!
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