From the first point of contact to when they pulled away. Golden State Comfort Systems made my family and I feel like we mattered. While we requested estimates from multiple providers, we found Golden State to be the most comprehensive estimate. They even kept us from overdoing our system! Another company attempted to upset us on a massive unit. So glad we steered clear. Greag saved us money, and kept us cool! Thanks again Greg! You guys are great!!! read more

Greg and mark were the best service for my hvac service I could've asked for . I highly recommend their company. Very good communication, taught me new ways to maintain my ac unit. Thanks again and would hire them again. read more

Greg and Mark are the BEST!! They were on time, friendly, super knowledgeable, and explained everything they were doing during the installation! Great prices! Definitely recommend!! 5'stars!!!!!!!!!!! read more

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! read more

Had a new furnace and AC installed. Answered questions promptly. Fair price, good quality work.

I had them come out twice now in different years and I appreciate how prompt and thorough they are. Super nice and efficient in my opinion and fairly priced based on quotes I got from other places. I also liked how quickly they were able to come to my house for my issue/concern. read more

Highly recommended!! Our AC wasn't blowing cold air during the heat wave and our normal company was closed for 3 days. We called around everywhere in Solano county. Golden State Comfort Systems was the first to contact us. Mark was professional, prompt and extremely knowledgeable. I experienced such a high level of customer service and you can tell it was genuine! My plan was to stick to the same company that has helped us for years after this service but not anymore. Thank you Mark! read more

Greg & Mark came out to check our thermostat. Completed work in 5 minutes. Very, professional, courteous, knowledgeable, and very friendly. We highly recommend them. Ed & Denise Kimble read more

WOW! How grateful my husband and I for this company and their professionalism! Our heater went out recently, and we knew we needed to get it checked out ASAP! We reached out to Mark, and he was able to arrange something so QUICK! He immediately told us the issue, and gave us a quote, and told us his availability. We ended up needing a new furnace, which can be costly... He was honest with us, and gave us a fair price. Another company was going to charge us twice as much!!! 100% recommend this company for all your heater and air conditioning needs!! they have customers for life. THANK YOU MARK AND YOUR TEAM!!!! looking forward to being warm in my house again. read more

I have owned several homes and rentals and dealt with lots of contractors. I would highly recommend Greg & Mark (Golden State Contort) for any HVAC work. They are fair and honest and pay attention to detail. I would hire them again in a minute and recommended them to my son. read more

Greg and Mark came by to look at our A/C unit that (we thought) wasn't working. After a thorough inspection, they determined nothing was wrong, and in fact the unit is in excellent condition. Turns out we probably had an issue with our Nest system and programmed it incorrectly. The A/C is now working great. Anyway, Greg and Mark were super helpful in troubleshooting the issue and they did not accept any kind of payment since no repair was done. These are honest guys who are super responsive and easy to do business with. They accommodated my changing schedule and we're courteous on the phone. If I could give them ten stars, I would!! I HIGHLY recommend them!! read more

Mark converted my heating and air system to dual so I can now be comfortable whether upstairs or downstairs - finally. Mark was terrific. He was polite and I believe he was very honest. I interviewed several companies and had no upselling from Mark. I would not hesitate to hire him for future heating and air needs. read more

After 6 long years of debating whether we should get AC for our house, we finally did it! And we couldn't be any happier with Golden State Comfort, who was recommended by 2 of my coworkers!! Greg & Mark are a blessing. They gave us a quote when we were shopping around for A/C, probably 3 years ago. When we finally decided to have it installed, we called them back and the price was about the same from the first quote! They don't rip you off, they don't oversell you on products you don't need, and they don't pressure you into going with their company. They showed up on time on the day of installation, they were super friendly & professional, they were quick & thorough, affordable, and what I appreciated the most was that they even went the extra mile to do a little maintenance on our heater without us asking.. We are so satisfied with their service & HIGHLY recommend Golden Comfort! Thank you, Mark & Greg, we are ready for summer read more

Mark and Greg just installed a new air conditioner. They are the most honest and efficient company. I have used them for over a few years.They do not jacked up their prices at all. I can't say enough for their honesty. I highly recommend this company for service read more

Mark & Greg were *fantastic*. I spent a lot of time talking to different contractors about the heat pump & AC setup I wanted to switch to, and they were extremely helpful in answering my questions, highly competitive with their quote, and did a great job on the installation. I couldn't be happier, truly. read more

Tried to get them to do a service call to analyze issues with new heat pump that installer does not appear to understand, and they refused, because it was a newer unit installed by someone else???? Isn't repair service supposed to be for units that need repair service??? read more

Mark and Greg installed a brand new heating and air conditioning system in our home. Professional, honest, did the work when they said they would, and best of all, they did the estimate, the work, and the followup themselves to make sure we were happy. Quality work!! Thank you!! read more

Greg and Mark are the absolute best. We have used Golden State for service calls (on heating and A.C. units installed by others) and we have used them for new installations. This past Friday our heater went out. I called Greg who said not to worry and he would be here to look into it. Greg came Friday looked at the heater, and said we would need to replace it. He came back today(Monday) to install a brand new heater. I am very pleased with the value, professionalism, and cleanliness Golden State provides. I have dealt with service companies in the past, Golden State is hands down the best. read more

We can highly recommend Golden State Comfort Systems! We had to replace our A/C earlier this year and they were one of the companies that came to our home to give us a quote. They did not push us or try to oversell us. They were extremely professional and really nice. We chose them to install our new system and were not disappointed. They lived up to every promise they made. They arrived on time, installed our new system within a short time, took great care to keep our home and furnishings clean, and always kept us informed what was happening. The first day after installation, our A/c experienced a minor glitch. They came by as soon as we called them and remedied the problem, even though it meant one of them had to leave a family function. That was truly going above and beyond! Our A/C has run perfectly efficient ever since. It passed all inspections with no problems. Again, we couldn't have been more satisfied with their services and highly recommend them. read more

Greg/Mark of GSCS came to my home and did a annual maintenance service to my heating and air conditioning. I'm lucky to not have any real issues with both units, but knowing the Greg or Mark were there to check and maintain everything for me and my family, allows me to feel safe during the most coldest winters and the occasional heat waves we get in Benicia. I highly refer them for their personal customer service, and attention to details I may have overlooked myself.... 5*s ! read more

It was an absolute pleasure to work with Mark and Greg. When I called them for a quote they showed up the same day within hours, explained to me all of my options, and gave me an estimate right then. This is so much better than my experience with others where I call one day, someone shows up after days or even weeks for an estimate, and then I get a quote over email after few more days. The price they quoted was excellent and better than most others I got a quote from. They scheduled the furnace and AC installation job within a week after I confirmed I want to hire them. They showed up on time, did an excellent job, very professional, left my place all neat and clean. They even fixed stuff in my water heater that was NOT their job, but they noticed the problem and fixed it - at no extra charge. Keep up the great work guys, you are the best! read more

We have used Golden State Comfort Systems to install HVAC units in three different houses. They are great which is why we keep using them. Each time they went above and beyond our expectations with quality work, timely arrival and friendly service. The unit we had installed over four years ago is working great, and I'm very impressed with our new unit as well. Their prices are competitive. I also appreciate that they arrive when they say they will and do a good job of cleaning up after. I will definitely recommend them if any of my friends or family needs an HVAC installed. Don't hesitate to use them, you'll be glad you did! read more

Mark was very courteous. I looked GSCS up on yelp and saw they had great reviews, was glad I wasn't disappointed. I thought the bid was a bit high so I double checked them, and even the other company I called said GSCS had a good bid - that they send referrals to them. If another company is referring you business then you KNOW you're going to be taken care of. Will be using these guys for all my AC bids and work from now on!! read more

We purchased an older home at the beginning of 2020 in Napa. It gets hot up here so contacted several companies for air conditioning bids. Greg and Mark were straightforward and provided a couple of great options. We love our new AC and had no problems over a very hot summer. I would highly recommend Golden State Comfort Systems. read more

They have such great reviews on here, I'm not sure why. I submitted the form on their website for an estimate and nobody ever got back to me. Why have a form on your website to request an estimate if you aren't going to respond? read more

Mark and Greg deserve the 5 stars from my husband and me. They installed a TRANE Furnace and a TRANE AC. They were wearing their masks, of course. They work as a team. They are very nice and professional. They even have the time to show me things that I wanted to see. Of course, I did not want to slow them down. When they were done, the place was very clean, just like they were never there. We've been using our new furnace and we are very happy. We have not used the AC yet since installed but I am sure we will be very happy too. My husband said "They know their tomatoes." We highly recommend this team. read more

Excellent work! Very satisfied customers! Plus they were $5,000.00 cheaper than other companies! Two men worked from 8:30-6:00 & explained the wall control system to us! Professional, friendly & highly trained! read more

Amazing company! They are prompt, courteous, professional and clean. They replaced my furnace and did such a great job I called them two years later when my air conditioner needed replacement. I can't say enough about these two guys. Greg and Mark go above and beyond. I highly recommend them. read more

Great company! You can't beat their prices! Very professional. Thank you Mark and Greg for our new Heater and AC. If I could rate them a 10 I would! read more

GSCS just replaced our HVAC and we are very happy with the job done by Greg and Mark. Very efficient, show up when promised and know their business. read more

Trust your gut, these guys are the real thing. Up front, honest and they provide excellent CLEAN service. We were surprized at how quickly, efficiently and cost effective they got the job done. We needed a brand new furnace and AC unit and hands down these are the GO TO guys!! Don't shop around, these guys are the ones you want to go with. read more

Golden State Comfort Systems is the only way to go. After a few estimates Mark and Greg won me over - Both are knowledgable, competent and extremely thorough. They did a great job providing us with a great product after years of battling the heat. Very professional, very nice and highly recommended! There is no doubt in my mind the job was done to perfection. These guys are great! No need to shop around anymore!!! Thanks Mark! Thanks Greg!! read more

Mark is great! He helped my mom with a project then she highly suggested I call to get my heater fixed. I'll be nice and toasty from now on!

Golden State comfort heating and air is a top notch quality company that is second to none.Owner Greg gives 5 star service and great prices.He believes in doing it right the first time,he takes pride in his work like no other.If you need anything done for your heating and air conditioning needs use these guys.I promise you will not be disappointed! read more

We were replacing our HVAC. We did a lot of research and had several companies come to provide estimates. We ended up selecting Golden State based on several factors:(1) the owners Mark & Greg do all the work, (2) Being owned and operated by the two of them their overhead was lower than some of the larger companies, which was reflected in their estimate, (3) Mark & Greg did exactly what they advertised. Both were on time for all scheduled appointments and worked full days while on site. It should also be noted neither of them smokes. No prolonged cigarette breaks and the house did not have the odor of a smoker. We highly recommend this family owned and operated business. read more

Greg & Mark have always provided great service to me both personally and professionally. They do a great, job are honest, and stand behind their work. I highly recommend them read more

I used Golden State Comfort Systems to replace my heating and air conditioning system. Greg and Mark were professional, prompt, and courteous. They were knowledgeable and answered any questions I had about the heating and air system. They were very efficient in the use of their time. Had the system installed in 2 days. One thing my wife noted is that even though we had intermittent rain, they did not track dirt into the house because they used shoe covers! This was very thoughtful of them whenever they entered the house, rain or shine! I definitely recommend them. read more

Got a quote from Mark it was very reasonable. He ordered parts and two days later Greg was out to repair our air conditioner. Very professional. We will use them again. Thank You. read more

These guys are excellent. They've been to my home 3 times now over the years, and every time they've come I've been satisfied. Today was the most recent visit (dogs ruined the ducts under the house). They showed up 15 minutes early and were done in an hour. I don't even bother getting other estimates anymore. These guys always have had the best price. Very personnel yet professional. I highly recommend. Shop around, you won't find cheaper prices for quality work. read more

We had a wonderful experience with Golden State. They were great to work with and Greg and Mark were flexible and efficient. They kept us aware of potential problems and went above and beyond to make sure our older house was not damaged during HVAC installation. They were punctual and fun to be around. We will use them again. read more