Safe, Reliable, and Efficient HVAC Services

Experienced Heating, Ventilation, & Air Conditioning


Preventative Maintenance, Emergency Service, Installation and Routine Repair.

We opened our company back in 1970 as “Rasmussen Heating and Cooling”. While the times have changed, we still have the same primary focus; provide cost-effective solutions for our customer’s heating and cooling needs. With decades of experience, our mechanical HVAC service experts can prepare preventative, predictive, and proactive solutions. Our industrial and commercial HVAC services keep you comfortable all year round. Our heating, ventilation, and air conditioning services include:

  • Emergency Service and Repair
  • Air System Retrofits
  • Industrial and Commercial Maintenance Programs
  • Turn-Key Design-Build Projects
  • HVAC Parts and Products
  • Comfort Control
  • Performance Contracting
  • Full Engineering Support
  • Indoor Air Quality Solutions
  • Temperature Control Services
  • Chiller Services
  • Full System Audits
  • Heat Pumps and Fan Coils
  • Furnace and Air Conditioning Maintenance and Installations

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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. See the Rasmussen Mechanical Services difference:

See the Service in Action


The RMS Sheet Metal Division employs professional skilled tradespeople. Our group has the tools needed to meet or exceed the Sheet Metal and Air Conditioning National Association’s technical standards. We offer a variety of design, prefabrication, and field installation services:

  • HVAC System Design (AutoCAD and 3D)
  • Dust And Fume Collection
  • Kitchen Exhaust Hoods
  • Equipment Enclosure
  • Fabrication And Installation Of Square Or Round Ductwork (single and double wall)
  • Stainless Steel Welding, Fabrication and Installation
  • Industrial Process Design, Fabrication And Installation
  • Custom And Specialty Fabrication


As the Mercy Medical Center grew, their need for a dependable, responsive, and innovative mechanical system became their priority. To satisfy this need, our HVAC Services division was hired as the primary contractor. This included design and installation of a new chiller plant, diesel generator, building automation, and emergency response system.


We have the expertise to maintain and repair furnaces, heat pumps, boilers, and geothermal heating solutions. From fans to air conditioning maintenance and AC replacement, we can help. Common brands we carry, service, repair, install, and maintain: Honeywell, Siemens, Carrier, Trane, York, Johnson Controls and more.

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We Know Chillers

Performing Services on a commercial chiller system

Let our HVAC Services group tackle all of your chiller needs. Whether it’s water cooled chillers, air cooled chillers, or chiller repair we have you covered.

When You Need More Than Just Repairs

When the solution involves more than a simple repair, our proven project management processes deliver on-time and cost-effective completion of even the most complex solutions.

  • Turn-Key Design Build Projects
  • Performance Contracting
  • Full Engineering Support
  • Dedicated Project Managers Accountable for Exceeding Customer Expectations
  • Responsive, Responsible, Accountable Communication

Preventative Maintenance, Emergency Service, Installation and Routine Repair; From when our company began back in 1970 as Rasmussen Heating and Cooling to today, our main focus has been on providing cost effective solutions for our customer’s heating and cooling needs.

  • HVAC system design and Installation
  • Chiller, cooling tower, pump and AHU repair and replacements
  • AC and furnace repair and retrofits
  • Indoor air quality solutions
Rasmussen Mechanical Technician working on a cooling tower
Tech standing next to installed Makeup Air Unit

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.