Whether it is emergency repair of an air conditioning system on an 85-degree day or planned inspections and maintenance to help avoid an inconvenient and costly crisis, Hermanson’s Service Department brings you the expertise and dedication you need.

Hermanson’s Service specialists provide cost-effective, comprehensive preventative maintenance and around-the-clock emergency service for HVAC and Plumbing equipment and systems. Qualified technicians can address your needs for almost all makes and models of mechanical equipment for commercial, government, and telecom installations, as well as providing Test & Balance, Commissioning / Retro-Commissioning and Energy Tune-Up services. Our goal is to provide practical solutions that result in maximum comfort and dependable, efficient systems operation for customers throughout Western Washington, Central & Eastern Washington, and Oregon.

Custom-designed maintenance programs assure maximum system efficiency, allowing us to spot and correct potential problems before they become serious and shorten the life of your equipment. You can count on Hermanson for quality service, well-trained and experienced personnel, and single-source responsibility backed by our commitment to customer satisfaction. 

Contact us today at (866) 575-7574 or


Our Services


  • HVAC Service & Maintenance
  • Chiller Service & Rebuilds
  • Boiler Service & Rebuilds
  • Air Conditioning
  • Heating
  • Ventilation
  • Controls
  • Pneumatic Controls
  • Air Compressors
  • Cooling Towers
  • Refrigerant Retrofits
  • Refrigerant Tracking
  • Predictive Services
  • Vibration Analysis
  • Oil Analysis
  • Shelter & Cabinet
  • Small Cell
  • Laser Alignment
  • Remote Services - Inspections & Disaster Recover
  • Plumbing Service
  • Backflow Device Testing
  • Hot Water Tanks
  • Water Coolers
  • Circulating Pumps
  • Pressure Regulating Valves
  • Mixing Valves
  • Tempering Valves
  • Water Treatment
  • TAB, Commissioning & Controls
  • Building Tune-ups
  • Fire Damper Testing
  • Indoor Air Quality
  • Assessments
  • Air Balance
  • Water Balance
  • Building Envelope
  • Assessments
  • QA/QC
  • Third Party Commissioning
  • JCI FX/Verasys
  • Tridium Niagara


13,294 sq mi

Service Area


Preventative Maintenance Agreements


Office Service & Repair Contracts



Service & Repair Contracts for Public Clients


Multi-Family Residential Service & Repair Contracts


Critical Environment (Data & Healthcare) Service & Repair Contracts