MacDonald-Miller Service Technician in Inland Northwest

Making buildings work better since 1965.

MacDonald-Miller is not your typical commercial HVAC contractor! As a union company, our service technicians receive the highest level of skill development and certifications in the industry. Our techs are continually trained by industry experts to ensure they operate by the highest standards of safety and best-in-class practices.

Customers can expect:

  • Priority Response
  • Guaranteed Jobsite Safety
  • Transparency
  • Efficiency and Consistency
  • Reliability

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MacDonald-Miller MacLens


MacDonald-Miller is the first mechanical contractor in the INW to offer the only integrated field service solution which captures real-time photos & videos. 

Our service technicians are equipped with MacLens, an app on their phones which provides real-time visibility of the condition and performance of our customer’s equipment. Information is delivered and accessed through an integrated cloud-hosted software platform in our customer portal.

Thanks to MacLens, the ability to see the exceptional work MacMiller is performing is right in front of you.

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HVAC Service Technican on Rooftop


  • Dedicated Account Manager
  • Emergency Services
  • Preventative Maintenance
  • Air Quality Filter Services
  • Building Performance Analysis
  • Commercial Boiler Services
  • Commercial Chiller Services
  • Plumbing Services
  • Building Automation / Controls System Support
  • Standard Repair & Replacement Services

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Customer Review


“MacDonald-Miller has been a great partner over the years. We needed a firm with knowledge in data centers and mission critical facilities, with focused experience in Preventative Maintenance, but also with depth in Mechanical Engineering and Design/Build services that could help us resolve issues that often spring up months to years after a construction project has been completed. 

They have proven to not only be capable, but experts in their wide range of capabilities.  We have used them for Preventative, and Emergency Maintenances, Design/Build Projects, Controls, Electrical Services, and even to augment manpower during Critical Electrical Maintenances.  Our experience with their technicians is that they are conscientious and treat our equipment like their own. I would have no problem recommending MacDonald-Miller Facility Solutions for any one of their specialized services.” – Matt Simpson, Sr. Building Engineer at VMware

How can we help you today?

We make buildings work better.