Three Ras Mech Employee installing an HVAC Rooftop Unit in the early morning

ROOFTOP UNIT SERVICES

Experts In Installation, Maintenance and Repair

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THE ROOFTOP UNIT EXPERTS

For over 50 years we have been installing, maintaining and refurbishing rooftop units across the Midwestern United States. With 7 locations, and over 200 employees, Rasmussen Mechanical has wide-ranging expertise in commercial and industrial RTUs. Our Rooftop Unit solutions include:

  • Equipment Sizing and New Installation

  • Refurbishment, Retrofits and Repair

  • Inspection and Compliance Testing

  • Process Piping And Pump Sizing

  • Maintenance Agreements 

  • Parts and Filters

Rasmussen Mechanical Services Service Truck parked in front of an American Flag

ABOUT US

For over 55 years, we’ve been helping facilities across the Midwest keep their rooftop HVAC units running efficiently and reliably. From installation and maintenance to repairs and retrofits, our team delivers full-service solutions that improve performance, extend equipment life, and reduce energy costs—keeping your operation comfortable and cost-effective year-round.

NEBRASKA OFFICE LOCATIONS: Council Bluffs, Denver, Gibbon, Lincoln, Omaha, Sioux City, and Sturgis.

24/7 EMERGENCY SERVICES: 800-237-3141

EMAIL: sales@rasmech.com

Office Hours: Monday - Friday: 7:00am - 4:00pm

crane and boom lifting a rooftop unit into place on top of an industrial facility

YOUR SINGLE SOURCE FOR SERVICE PARTS AND INSTALLATION

Our heating and cooling professionals are factory-trained experts who understand the intricacies of engineering and service work. Our HVAC Services division can provide timely and professional guidance both to 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

  • Industrial and Commercial Maintenance Programs

  • Expert Service, Repair and Retrofits

  • Ground Up Design and Installation

  • Dedicated Project Managers

  • Over 10,000 Parts In Stock

  • Reliable Communication

  • Full System Audits

CALL THE EXPERTS TODAY AT

1-800-237-3141

ROOFTOP UNIT MAINTENANCE

By regularly maintaining your RTU you can extend the life of your equipment and reduce energy use.  Proper rooftop unit maintenance also ensures your system effectively regulate air quality, temperature and humidity in your facility.  With over 50 years in business we have worked at locations ranging from government buildings and manufacturing plants to mining companies and medical facilities. Some common rooftop unit maintenance tasks include:

TECHNICIAN CHANGING HVAC FILTER

  • Examine and tighten all electrical components and record operating amps

  • Examine control set points, air dampers, contactors, refrigerant charge 

  • Clean coils, drain pan,  fans, housings and change filters and belts

  • Lubricate motor bearings and fan bearings 

  • Check temperature split across coil

  • Inspect damper linkages

  • Examine all safety controls

  • Inspect economizer

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.

Rasmussen Mechanical Services fleet truck equipped with tools and ladders, ready for on-site boiler and HVAC service.

DAKOTA ETHANOL

Rasmussen became my “one stop shop” for ALL my boiler needs. All I had to do was call and explain what was going on and then sit back. Parts were ordered in a timely fashion and Techs arrived when they said they would. Work was always done quickly and second to none! Great feeling knowing I have a company that has my back and has proven it over and over for the past 21 years.

DAIL DAILING – UTILITIES MANAGER

LAUREL – CONCORD – COLERIDGE SCHOOLS

Rasmussen Mechanical is a key partner in our school district's efforts to maintain effective and efficient mechanical systems.

JEREMY CHRISTIANSEN - SUPERINTENDENT

HUGHES BROTHERS INC.

We needed (help with) mechanical projects; welding, boiler, steam, condensate, compressed air, in different areas around our plant.  Rasmussen Mechanical Services helped us evaluate our options and save us a lot of time and money to get back on line – ASAP.

MATT STRYSON - PLANT ENGINEER

COUNCIL BLUFFS COMMUNITY SCHOOLS

I wouldn’t recommend anyone else… We had issues that other technicians couldn't get to the bottom of so Rasmussen came in and did the repair work and followed up with preventive maintenance.

PETE MCNEAL

HOWARD COUNTY MED CENTER

We get all of our help from Rasmussen. I can call on the phone and talk with somebody and they are local.

ROGER GRIMM

WIRECO

You were by far the best outside contracting crew we have ever had the opportunity to work with. The knowledge and expertise was superior. Your guys did an outstanding job replacing our boiler's burners.

JAMES RUCKER - MAINTENANCE SUPERVISOR

RIVERSIDE ELEMENTARY – OAKLAND, IA

Rasmussen does the job right the first time.

STEVE FEAUTO – MAINTENANCE SUPERVISOR

BOYSTOWN NATIONAL RESEARCH HOSPITAL – OMAHA, NE

I’ve worked in facilities all my life, for 35 years. I would recommend Rasmussen Mechanical because of their outstanding service and reliability... If my boilers break down I know who I’m going to call and who’s going to show up.

DAVID MCATEE – DIRECTOR OF OPERATIONS

KELLOGS – OMAHA, NE

I would recommend them to work with other people just based on the quality and craftsmanship of their work. We went from 75%-80% efficient to 92%-94% efficient. A 12%-15% gas savings for the plant.

CONRAD BALDWIN – FACILITIES UTILITIES PLANNER

MARS PETCARE – AURORA, NE

They’ve done a tremendous job for us. Not only are they there to do a job, but they can break it down to layman’s terms, so that as an operator, I can practice what they teach me. We’ve learned from their experience so it’s kind of a win-win for all of us.

ROBERT STYLES – UTILITY TECHNICIAN

WEST PHARMACEUTICALS – KEARNEY, NE

They do more than what’s expected and we have one contact we can call for many different services.

JOHN NIKKILA – UTILITY TECHNICIAN

RIVERSIDE LODGE – GRAND ISLAND, NE

After the first boiler, we were so pleased with their service and quality that the second one was a no brainer.

BRUCE GREGERSEN – UTILITY TECHNICIAN

CALL THE EXPERTS TODAY AT

1-800-237-3141

ROOFTOP UNIT INSTALLATION

Rasmussen Mechanical Services team standing on the rooftop with a Trane RTU

Let the experts at Rasmussen Mechanical help with your Rooftop Unit replacement. We can perform the demolition and installation of new RTU. Installation will vary depending on size and type but here are a few common installation practices:

• System Evaluation And Appropriate Rooftop Unit Selection

• Site Prep And Removal Of Existing RTU

• Place RTU Correctly On Foundation

• Install System Piping

• Perform System Start-Up

SCHEDULE YOUR SERVICE TODAY!

GET THE HELP YOU NEED FOR ALL THINGS MECHANICAL

BRUCE RASMUSSEN IN FRONT OF A COOLING TOWER

SAVE MONEY MANAGING COOLING TOWER WATER FLOW

We have encouraged a number of facilities to let us examine the flow rates on their cooling towers units. This way we can see if we can improve overall efficiency. Fortunately and unfortunately for facilities, we have a high success rate at finding issues. We often find some zones are overflowing, some zones are under flowing and air side velocities are all out-of-whack.

TECHNICIAN CHANGING HVAC FILTER

AIR HANDLING UNIT MAINTENANCE THAT GETS RESULTS

We have encouraged a number of facilities to let us examine the flow rates on their cooling towers units. This way we can see if we can improve overall efficiency. Fortunately and unfortunately for facilities, we have a high success rate at finding issues. We often find some zones are overflowing, some zones are under flowing and air side velocities are all out-of-whack.

TECHNICIAN CHANGING FILTERS ON A MAKE UP AIR UNIT

ROOFTOP UNIT MAINTENANCE CHECKLIST

Performing maintenance on your rooftop unit is important. Use these quarterly, semi-annual and annul maintenance checks to ensure your unit is in good shape. Also use our back-up parts checklist to ensure you are ready should a component fail.