Golden State Comfort Systems

Greg and his team were absolutely fantastic to work with from start to finish. In my experience, what really makes people choose an HVAC company comes down to trust, communication, honesty, pricing, and confidence that the job is going to be done right the first time — and Greg checks every one of those boxes. He’s incredibly knowledgeable, experienced, responsive, and easy to communicate with. You can immediately tell you’re dealing with someone who truly understands HVAC systems and has spent years mastering the trade. What I appreciated most was how honest and straightforward he was throughout the process. No pressure, no upselling, no trying to sell unnecessary upgrades — just real guidance on what made the most sense for the situation. Greg and his crew are especially impressive when it comes to residential furnace and AC replacements. Their installs are clean, professional, efficient, and thoughtfully done. They’re also great problem solvers and clearly know how to think outside the box when needed, which gives a lot of confidence on larger or more complicated jobs. Beyond the quality of work itself, they’re simply great people to have around — friendly, personable, respectful, hardworking, and professional. The kind of contractors you immediately feel comfortable recommending to family and friends. If you’re looking for an HVAC company that combines decades of experience, fair pricing, strong communication, and truly high-quality workmanship, I would absolutely recommend Greg and his team.

I have known Greg and Mark at Golden State Comfort Systems for many years. They're members of my business networking group as well. Greg and Mark are very knowledgeable and extremely thorough on the job. They sell Trane systems, which sell themselves. Greg and Mark have tremendous customer service and are a delight to work with. I highly recommend them for HVAC installation and repair!

Greg and Mark are amazing. My 23 year old AC decided to die during a heatwave 3 weeks ago. I reached out via Yelp and talked to Mark and Greg came out same day. Great communication via text. Super nice local Fairfield folks. VERY honest not trying to upsell me more expensive units and telling me what I really don't need and do. Took 1 1/2 days to do a full install of a new furnace and AC unit with testing. Fair price but mostly just cool guys who do great work and are easy to work with. HIGHLY recommend them. Thanks gents!