
LITTLETON COMMERCIAL HVAC INSTALLATION
Proudly Serving Littleton, Colorado For Over 55 Years

WHO WE ARE
Rasmussen Mechanical Services has been providing professional commercial HVAC installation in Littleton, CO for over 55 years. Our team designs and installs HVAC systems that deliver long-term comfort, energy efficiency, and dependable performance for commercial and industrial facilities.
We serve businesses throughout Littleton, Columbine, Ken Caryl, Grant Ranch, Bow Mar, Lakewood, and the greater Denver metro area. With decades of experience in complex commercial environments, we install HVAC systems that meet performance expectations, Colorado building codes, and long-term operational goals.
CONTACT US
Proudly Serving Littleton, CO
Office Number: 303-292-1113
24/7 Service Line: 1-800-237-3141
Email: rockymountain@rasmech.com
Address: 15335 E. Fremont Dr. Centennial, CO 80112
Office Hours: Monday – Friday: 7:00am – 4:00pm

COMMERCIAL HVAC SYSTEM INSTALLATION & REPLACEMENT
Rasmussen Mechanical Services specializes in commercial HVAC installation for Littleton businesses, including new construction, renovations, and system upgrades. Our team installs a wide range of commercial and industrial HVAC equipment, including:
Rooftop Units
Air Handling Units
Make-Up Air Units
Commercial Heating Systems
Chillers
Boilers
Building Automation Controls

RTU INSTALLATION
We provide complete rooftop unit installation in Littleton for office buildings, retail spaces, warehouses, and industrial facilities. Our RTU installation services include proper system sizing, curb and structural coordination, crane planning, equipment placement, and full startup and commissioning to ensure reliable, long-term operation.
AIR HANDLING UNIT INSTALLATION
Our technicians install air handling units designed to meet specific airflow, ventilation, and humidity requirements. AHUs are a critical component in maintaining consistent indoor comfort and indoor air quality for schools, healthcare facilities, and commercial buildings throughout Littleton. These systems are commonly integrated with chillers, boilers, and building automation controls.

MAKE-UP AIR UNIT INSTALLATION
We install make-up air units for commercial kitchens, manufacturing facilities, and large industrial buildings in Littleton. Our team installs both direct-fired and indirect-fired systems to support exhaust systems, maintain proper building pressure, and meet Colorado ventilation and safety requirements.
COMMERCIAL CHILLER INSTALLATION
Rasmussen Mechanical Services provides commercial chiller installation in Littleton for facilities that rely on chilled water systems for cooling, including:
Office Buildings
Healthcare Facilities
Manufacturing Plants
Institutional and Educational Campuses
Each chiller installation is evaluated as part of the complete HVAC system to ensure proper sizing, energy efficiency, and seamless integration with pumps, air handling units, and automation controls.

SPLIT SYSTEM & AIR CONDITIONING INSTALLATIONS
Split system and multi-zone HVAC installations offer flexible and efficient heating and cooling solutions for commercial buildings. These systems allow independent temperature control across different areas of a facility. Our technicians specialize in installing, maintaining, and replacing split and multi-zone systems for Littleton commercial properties, partnering with trusted HVAC manufacturers to deliver reliable, long-lasting performance.
COMMERCIAL HVAC SERVICES
In addition to installation, Rasmussen Mechanical Services provides full-service commercial HVAC support in Littleton, including:
HVAC repair and troubleshooting
Preventative maintenance programs
System replacements and upgrades
Equipment retrofits
24/7 emergency service
We service all major commercial HVAC equipment, including RTUs, AHUs, make-up air units, boilers, chillers, split systems, and building automation controls. Routine maintenance helps reduce downtime, improve efficiency, and extend system lifespan for Littleton businesses.

YOUR COMMERCIAL HVAC CONTRACTOR
Rasmussen Mechanical Services is a trusted provider of commercial HVAC services in Littleton, CO, with over 55 years of experience installing, maintaining, and servicing complex HVAC systems. Our technicians work with all major equipment brands and technologies, delivering solutions that improve comfort, efficiency, and reliability.
Our commercial HVAC solutions focus on:
Lowering energy and operating costs
Supporting code compliance
Improving airflow and indoor air quality
Delivering consistent temperature control
Ensuring long-term system performance
Businesses throughout Littleton, Jefferson County, and the Denver metro area rely on our team as a long-term mechanical partner.

Building Automation Integration
Modern commercial HVAC systems in the Littleton area greatly benefit from building automation integration, which offers centralized control, enhanced energy efficiency, and improved indoor air quality. Rasmussen Mechanical Services excels in integrating HVAC equipment with state-of-the-art building automation systems (BAS) tailored for commercial applications.
Our skilled technicians design and implement automation solutions that enable facility managers and clients to monitor system performance, make informed decisions, and optimize HVAC operations for maximum efficiency and comfort. From initial engineering and installation to ongoing maintenance and support, we are committed to delivering quality work that drives long-term value and customer satisfaction.
SCHEDULE YOUR SERVICE TODAY!
GET THE HELP YOU NEED FOR ALL THINGS MECHANICAL
LOCAL REVIEWS

“For all of my company’s boiler needs, I won’t go anywhere else. George, Gus, Carrie, they have all the connections that I will ever need, from boilers to automation controls.”
Dale Meyer, Stranahan’s Whiskey Distillery & Cocktail Bar
“Stacey and Aaron have been awesome. Great to work with and really exceptional with resolving issues. I have 100% confidence with your team. St Julien has found a vendor of choice.”
Ron Gallion, St Julien Hotel & Spa