Using AI and Building Analytics, we bring you Impact-Driven Service. Explore our interactive webpage to learn more


Your Partner In Building Technologies

We combine the best in commercial building automation, HVAC equipment, HVAC service, security systems, and parts to provide a custom solution for maximum building performance and peace of mind.

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Building Technology Pros

As a system integrator, we engineer, secure, service, and automate systems in commercial buildings.

Building Automation

Building automation systems are the brain of your building. We'll help make your facility smart.

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HVAC Equipment

Get premium, energy efficient HVAC equipment combined with expert consultation, design, and fulfillment. 

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HVAC Service

To run like a well-oiled machine, your building must be maintained like one. We can help. 

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Security Solutions

Keeping your building and occupants safe is your highest priority - and ours. We have the products and expertise you need for maximum security.

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LONG PartsPros will get you the HVAC, controls, and security parts you need, when you need them.

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LONG Locations

With 17 offices across 7 states, our teams are available to assist you state-wide. Click the state to view contact information.

LONG Careers

Looking to join an award-winning company with a great work-life balance and plenty of opportunities for career growth?

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Great Place to Work Certified
2017 - Present

 Denver Post Top Workplaces
2016 - Present

Our Clients Speak Out

“LONG has skilled specialists who can address specific critical issues with each part of our system. The depth of their team helps to keep our systems running efficiently. I expect that as we continue to work together, that we will be able to make our systems run even better and more efficiently.”

Wayne M. Robinson
Central Wyoming College
“LONG understands and recognizes the challenges of HVAC’s, Controls and BAS which is an essential requirement for their organization to successfully provide services to their clients. They understand the needs and how to collaborate and work together with their clients to deliver better outcomes for comfort.”
Jose Ortiz
Arapahoe Library District
“LONG has been a positive and outstanding business partner in every way possible -- I look forward to maintaining our partnership for years to come.”
Steve Hoyt
Mountain States Employers Council
“They always go out of their way to make sure I am taken care of. There has been many times they have stayed so I can get the parts I needed.”
Troy Cole
Denver Public Schools
“…Jake is the best parts guy I know. I have used him for about three years now for most my part needs here at the stadium. There have been a couple times where he has really got me out of a pinch by providing a part last minute and even offering for someone to bring it down to me. I always know I will get a quick response on any request I have. Because of Jake we will continue to use LONG as out first option for parts here at the stadium.”
Jeremiah J. Roybal
Denver Broncos Football Club
“The Woodbrooke Junior High School project was our first experience with LONG back in 1996. We have seen improved control efficiencies resulting in reduced energy costs and improved operational efficiencies as well. Competitive pricing, good industry reputation, and a solid solution is why we first chose LONG. LONG’s ongoing high level of service is why we continue to partner with them.”
Dale Brewer
Clover Park School District
“We have been using LONG since they won the bid for their part of the construction of a new middle school for our district in 2003. The technicians were always great to work with and will be a valuable resource in the future.”
Robert Michaels
Washakie County School District No. 1
“As design fees shrink and more is expected of the design consultants, we can rely on Long to be part of our team design approach. We work very well together, partly because of Long's responsiveness, but mainly because of their willingness to go the extra mile.”
Bob Colasuonno
Henderson Engineers (HEI)
“LONG knows that service is key to long term relationships. LONG is extremely responsive to all issues and is an excellent real time communicator. They have done a great job responding to our demanding matrixed organization.”
Rich Hildreth
Providence Health & Services
“Great customer service and support relating to project planning and implementation. Quick response to service requests, ownership over work product, and clear communication regarding project expectations. Keep up the great work!”
Brandon Bird
Cornish College

Ready to make your building more efficient, cost-effective, comfortable, and safe?  

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News & Knowledge Center

AHU on rooftop with other HVAC equipment

The McKinney Center Refurbishment for the CDCPDA

In downtown Seattle, WA, a large commercial building stood uninhabited for over a decade. In 2021, the Central District Community Preservation and Development Authority (CD CPDA) took ownership,

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Press Release: We've Partnered with Rauland in Alaska

Our Alaska office is proud to announce an exciting new partnership with Rauland, a global leader in healthcare communication solutions. As Rauland's only healthcare distribution partner in Alaska, we

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The Security Risks of Proximity Cards

As our technology advances, we get more options and functionality when it comes to security solutions for commercial buildings, but the danger of security breaches evolves along with it. Recently,

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