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, 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.

Our Representatives

Seattle Central AreaScott Morton

North Seattle AreaAuldin Ness

East Seattle AreaCody Binns

South Seattle AreaCori Witney

Oregon AreaDave Casias


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
  • Laser Alignment
  • 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