William Stewart Pittsburg, CA

Rated Excellent
Rated Excellent from 1 review
With more than 38 years in the mechanical business, Stewart is dedicated to providing the best solution for your needs, including commercial, industrial & residential heating, air conditioning and solar voltaic systems. We do our projects right the first time and it shows, as our company is built on referral business. In 2008, approximately 65% of our business was from referrals. This enables us to focus on quality, and installing systems that work the first time, every time while meeting your unique design requirements.

If we don't provide what you need and want, we're not doing our job. Our employees are trained to ask questions and find out what your specific desires are, and then to see your job through from start to finish - ensuring your 100% satisfaction.
Services Offered
  • Commercial HVAC
  • Cooling Services
  • Design Services
  • Heating Services
  • Indoor Air Quality
  • Industrial HVAC
  • Maintenance Services
  • Residential HVAC
  • Systems & Equipment
Contact Information
Phone Number (925) 427-5522
City Pittsburg, CA
Zip Code 94565
Address 671 Willow Pass Rd # A
Professional Associations and Certifications
  • North American Technician Excellence
North American Technician Excellence
Products and Services
Indoor Comfort Control means more today than it did a decade ago. Current options allow us to provide you with the ideal comfort solution for your specific needs that will be reliable and affordable. We also offer options like air purification, advanced controls, zoning and remote access.
Modern homes and buildings are sealed more tightly to conserve energy. Unfortunately, this seals in indoor air pollution. Things like VOCs, molds, pollen, bacteria and other pollutants. Since the EPA ranks indoor air pollution among the top five environmental risks to public health, there is reason to be concerned.
Stewart Heating & Air Conditioning specializes in both commercial and industrial HVAC solutions. We know the extreme importance your HVAC system plays to the operation of your business or facility. Downtime typically isn't an option, while proper design and maintenance have substantial impacts on monthly operating costs.
Rated Excellent (5 of 5) from 1 review
  Testimonial by John Hunt
I was very happy with your technician who came yesterday. His name was Don, and he answered all of my questions with extreme patience and thoroughness. He explained Co2 and installed an alarm. My neighbor is looking for a new furnace, and I will definitely recommend your company!
  • Financing your HVAC system.
    Financing your HVAC system.
    Residential Home Consultant Staci, talks about details on the Stewart HVAC financing program. This ongoing Video Blog series helps educate and inform clients and potential clients on the many facets of installing a HVAC system in your home or office.
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