Air Handling Unit Services

Experts In Installation, Maintenance and Repair

The Air Handling Unit Experts 

For over 50 years we have been installing, maintaining and refurbishing air handlers across the Midwestern United States. With 7 locations, and over 200 employees, Rasmussen Mechanical has wide-ranging expertise in commercial and industrial AHUs. Our air handling 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

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Leaning On An AHU


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
  • Dedicated Project Managers
  • Responsive, Reliable Communication

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Air Handling Unit Maintenance

By regularly maintaining your AHU you can extend the life of your equipment, reduce energy use and eliminate downtime.  Proper air handler 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 air handling unit maintenance tasks include:

◉ Examine and tighten all electrical components and record operating amps

◉ Clean heating coil, cooling coil, drain pan,  fans and housing

◉ Examine control set points, air dampers, contactors 

◉ Change filters and belts

◉ Lubricate motor bearings and fan bearings 

◉ Check temperature split across coil

◉ Check expansion valve

◉ Examine heater safeties

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.

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Air Handling Unit Installation

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

• System Evaluation And Appropriate Air Handling Unit Selection

• Site Prep And Demolition If Existing AHU Is Present

• Offload Air Handler

• Place AHU Correctly On Foundation

• Install System Piping

• Perform System Start-Up

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Check Out Our Latest HVAC Blog Articles

Cooling tower with Bruce Rasmussen standing in front

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.

man holding hvac filters next to air handling unit

Air Handling Unit Maintenance That Gets Results

Routine AHU cleaning not only extends the life of equipment but reduces operating costs, downtime costs and troubleshooting costs. It helps mitigate the majority of these expenses because the issues are caught ahead of time.

Climate controlling an HVAC | RasMech

HVAC Maintenance Checklist

HVAC systems are one of the largest energy consumers in most commercial buildings at about 25% of total energy use. The graph below shows a study done by The Building Owners and Managers Association (BOMA International). This study focuses on a 20-to reciprocating rooftop air conditioner with a 14-year expected life.