HVAC Installation and Repair Since 1989

HVAC Installation, maintenance and repair in Benicia, Fairfield, Vacaville, Cordelia, Vallejo, American Canyon, Napa, Concord, Pacheco, Pleasant Hill and Walnut Creek.

North Bay Air Systems Inc have been in business since 1989 (30 years). This means we offer family and business’s the best products and services combined with a level of customer service that will exceed to your expectations. We are proud to say we have NEVER advertised. All of our customers have been strictly “word of mouth”. We know there’s a lot of people that are looking for dependable HVAC business’s, and we want to share why our business is so highly recommended by others.

Call For:

  • Residential & Commercial HVAC Installation
  • Equipment Retrofit & Replacement
  • Service All Makes & Models Including: Trane, Bryant, Goodman, Daiken, Mitsubishi, York & Lennox.
  • Professional Installation & Repairs
  • Replacing Duct Work

30 Years Experience With:


Whether we are installing a new HVAC furnace or A/C or are simply updating and replacing ductwork, we always send clear and concise proposals for approval before any work commences.  No surprises, no taxes and no gimmicks.

Repairs / Maintenance

Cleaning and testing for proper operation of all components insures years of trouble free and efficient operation.  With our experience, we can help you get the most out of what you already have.

Duct Cleaning/Sealing

Properly sized, clean and leak free ducts are vital to the performance of your HVAC system.  We can clean the pollens, dust and other harmful irritants out of the air that you breathe in your home or office.  Additional sanitation option available on request.


Inspection to access the condition of your HVAC system.  No repairs or diagnostics is done.

Maintenance Programs

Keep your HVAC system in top condition.  The lower costs of preventative maintenance will save you money over costly repair issues.

Serving These Areas:

Residential projects in these counties:

  • Solano
  • Napa
  • Contra Costa
  • Yolo
  • Sonoma

Specializing in these cities:

  • Benicia
  • Fairfield
  • Vacaville
  • Cordelia
  • Vallejo
  • American Canyon
  • Napa
  • Concord
  • Pacheco
  • Pleasant Hill
  • Walnut Creek

Commercial projects in these counties:

  • Solano
  • Napa
  • Contra Costa
  • Yolo
  • Sonoma

As well as in:

  • Oakland
  • San Ramon
  • San Francisco


Servicing All Major Brands Including: