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      Providence Swedish North Tower

      Seattle, WA

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      Redmond, WA

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      April 22, 2025

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      • Design & Preconstruction
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      • Energy & Sustainability
    • Markets
      • Commercial & Mixed Use
      • Healthcare
      • Government & Education
      • Life Science & Biotech
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    • Your Pathway to Building Compliance

      Learn More
    • Crafting Excellence in Fabrication

      Learn More
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    • Explore by project type
      • Commercial & Mixed-Use
      • Healthcare
      • Government & Education
      • Life Science & Biotech
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      • Explore all
    • Commercial & Mixed-Use

      T-Mobile Headquarters

      Bellevue, WA

      Learn More
    • Healthcare

      Providence Swedish North Tower

      Seattle, WA

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    • Commercial & Mixed-Use

      Whatcom Village

      Redmond, WA

      Learn More
  • People
    • Life at MacMiller
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    • Sustainability

      Q & A: MacMiller Pursues People-Centric Sustainability with Fitwel

      May 29, 2025

      Learn More
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      MacMiller Climate Pledge: Leading the Charge, Finding Solutions

      April 22, 2025

      Learn More
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      2025 Best Workplaces Award

      September 2, 2025

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We Make Buildings Work Better

Capabilities / Service & Maintenance

Service & Maintenance

  • Overview
  • HVAC
  • Plumbing
  • Electrical
  • Controls
  • Boiler
  • Chiller
  • TAB

HVAC

Designs, installs, and maintains heating, ventilation, and air conditioning systems to deliver consistent indoor climate control and energy efficiency.

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Plumbing

Provides comprehensive plumbing solutions — from system design to installation and maintenance — to ensure efficient water distribution and reliable waste management.

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Electrical

Offers expert electrical services including system design, installation, and upkeep, ensuring safe and reliable power distribution throughout the building.

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Controls

Implements advanced control systems that automate and optimize building operations such as lighting, HVAC, and energy management for improved efficiency.

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Chiller

Specializes in the design, installation, and upkeep of chiller systems, ensuring reliable and energy-efficient cooling for optimal indoor climate control.

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Boiler

Provides expert boiler system design, installation, and maintenance to deliver efficient and consistent heating for any commercial or industrial building.

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TAB

Certifies and fine-tunes HVAC systems through precise measurement and adjustment to ensure they operate at peak performance, efficiency, and comfort.

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Committed to excellence

Full-Service Maintenance

Being a MacDonald-Miller maintenance customer goes beyond a relationship on a piece of paper. It’s about the confidence of having the right team support, and the comfort of expert service 24/7.

  • Dedicated account manager
  • 4-Hour priority response
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  • Peak performance tasking
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