Heat pump & HVAC experts for Sonoma and Marin homes.

“Green Core Heating and Air offers exceptional service! From the phone call with Tony to meeting our tech Rich we were impressed with their friendliness and professionalism. Rich did a maintenance check on our furnace and checked our AC, giving us some good advice for the next summer season. We are now a Green Core family. HIGHLY RECOMMEND!”

“Great business with amazing staff like Sonny!!”

“Sonny is absolutely amazing and so good at explaining exactly what was happening and the solution to fix my AC unit.”

“Zach has excellent customer service and doesn't use hard-sell tactics. I highly recommend this company.”

“If you want top tier service and fair rates go with Zach and Tony and the crew. Treats ya like family and fast turnaround times. Lucky to have em local to us.”

“This is a family-run business by brothers Zack and Tony. I have known them for many years and they are stand-up guys. Zack has done work on my parents' HVAC and is always honest. Zack is always willing to stop by and check something out for you. He has also done work on my rental and the HVAC runs like a charm. Top notch!”

“Tony of Green Core fixed my A/C and reset my Nest Thermostat. 5 star experience.”

“Tony and Zach are a dynamic duo. Doing both high end residential and commercial work, it seems like there is not one step that is overseen during a project. It has been an absolute pleasure working with this team of very skilled and professional individuals. No job is too big or too small for this company and communication has been outstanding. I highly recommend working with this team.”

“We had Green Core come and service our HVAC unit. They came out and quickly found the problem and fixed it. They were professional and clean at a reasonable cost. We would definitely use their services again.”

“I'm a local property manager and have worked with Green Core Heating & Air on two different properties for ductwork replacement. I'm so glad I found them! As a small local business owner myself, I always appreciate finding other local, family-owned companies that I can trust. They've been great to work with, excellent communication, fair pricing, and honest recommendations without ever making me feel like they're trying to sell us something we don't need. Highly recommend!”

“Green Core's service couldn't possibly be better. They are easy and pleasant to work with, great transparent communication, expert technical skills, and it felt so clear that customer experience is important to them. Highly recommend you give them a call now if you have any related questions or needs.”

“Thank you Green Core for helping my grandmother with her AC! They were quick, friendly, and very knowledgeable with everything!”

“I recently had these guys come out to look at my A/C unit which was not coming on. They were there within a day and had the repair done a couple of days after that. Rich was professional and friendly. Will definitely be recommending Green Core to family and friends.”

“If you want your AC/heating done right go with Green Core!”

“Tony and Zach are two of the most knowledgeable and professional people in the HVAC industry. They stand by their work and always make sure their customers are taken care of. They are the kind of pros that you want installing HVAC equipment in your home or business. 5 stars all around!”

“Best, prompt service with the most personable folks out there.”

“5 stars. Professional and reliable. Ask for Tony. He's an old pro.”

“They know their stuff, lots of experience and good customer service.”

“Installed central heating & AC in my townhouse. Was told by a couple companies they wouldn't be able to do it but Green Core got it done. They were respectful, wore booties to keep the carpet clean. Zach and Tony were great to work with.”

“Tony came over, looked at my heater, and gave me a quote same day. They were very affordable and did an excellent job with my new furnace. Couldn't be happier with Green Core. Very professional service.”

“On time. On budget. And very neatly installed by Rich and Sonny. Second install I've worked with the Green Core team and will be back for another next year.”

“Zach and Tony were great — they came to fix my water heater within an hour and got it running. They also let me know how old it is and that I might need to replace it next time something goes wrong. Excellent service! Thank you Zach and Tony!”

“When we discovered that we needed to replace our heating system in one of our units, and after lots of research, we found Green Core Heating and Air. We were very impressed with all of the recommendations from Zach and Tony Milano of Green Core. Zach, Tony and Rich are not only knowledgeable and helpful, they're also friendly and patient. They are experts in their field and gave us the best value we could find. They stuck to the cost as described in the estimate. We had many questions and concerns, and they guided us through the process of getting a new HVAC pump system, every step of the way. The work was completed as promised, and we're enjoying a much better, more energy-efficient heating and cooling system in our homes.”

“Green Core did an excellent job installing our heat pump and heat pump water heater. Tony and Zack led the project and were fantastic to work with — knowledgeable, professional, and courteous from start to finish. They took the time to explain the system and answered all our questions along the way. The installation was clean and efficient, and it's clear they take real pride in their work. Highly recommend Green Core if you're looking for a team that knows heat pump systems inside and out and treats your home with respect.”

“Great guys, professional service and honest pricing.”

“On-time, professional and friendly. I would recommend and contact again in a heartbeat. Thank you again!”

“Great job, very happy.”

“Really good job, very professional and clean.”

“Very knowledgeable and great price!”

“Amazing service. The crew was professional and did excellent work. The site was left clean. It was a pleasure working with them.”

“Green Core installed our brand new Harvest thermal battery and heat pump HVAC system. Throughout the process, Tony and Zach were professional, communicative, transparent and always showed up on time. The work took exactly as long as promised and the quality level was beyond expectations. Green Core is a top notch company with an expert level team and I would trust them with the most complicated jobs. We're super happy with our Harvest system and so much of that is the seamless and flawless installation done by Green Core.”

“Green Core did a great job installing our heating system. It was incredibly fast, even with the installation of ducting. They worked with us to get the floor vents installed in the right places and were careful with our wood floors.”

“Tony, Zach and the two other men on the Harvest installation team worked well together and quickly. They had allowed for 5 days to do the installation but completed it in 4! It's a fairly complicated system, and they had pre-planned the configuration, so it seemed to go perfectly, but it's not a simple process. They explained the system to me clearly, and it seems to have been working for almost a full year flawlessly.”

“Green Core fixed my split AC on the spot! Couldn't be happier! Rich was super awesome. I should have called him for the install!!! Highly recommended.”

“5 star HVAC repair service from Green Core Heating & Air in Petaluma. A special shout-out to Rich "The Flare-Man" Cureton who replaced our leaking factory flares with works of art.”

“Green Core is the best in the business. Outstanding knowledge and pricing. The quality of work was exceptional. Great experience!”

“I had a great experience with Green Core Heating & Air when they serviced my home in Petaluma. Zack was professional, knowledgeable, and easy to work with from start to finish.”

“Best HVAC tech around. Prompt, courteous, reliable, and best prices! I have used them over and over for my homes and highly recommend them!”

“I had an excellent experience with Green Core HVAC. Zach and Tony were extremely thorough, respectful of my home, and clearly experts at what they do. They diagnosed the issue quickly, walked me through the options, and completed the work with outstanding attention to detail. The professionalism and customer service deserves recognition. I wouldn't hesitate to call them again.”

“One of the best HVAC companies in Northern California. Easy to work with, quality work. A step above the rest!”

“I highly recommend Green Core Heating & Air. We had a few odd issues with our heat pump / mini split heads and Rich spent all morning diagnosing it and checking everything thoroughly until he figured it out. He took the time to explain everything clearly to me and helped me understand the system better as well. Great experience all around and the price is unbeatable!”

“I love my heat pump. Zach helped me with the decisions and in a couple of days it was installed. Zach, Rich, Sonny and Alex were very efficient and considerate and did an excellent job. Zach took care of everything I needed to get a rebate. I highly recommend Green Core.”

“Zach Milano and his crew at Green Core Heating and Air are outstanding. Zach is a true leader: thoughtful, positive, professional, and always smiling. He brings a great attitude to every interaction and sets the tone for his team with clear communication, care, and pride in the work. The crew was reliable, respectful, and easy to work with from start to finish. I highly recommend Zach and Green Core Heating and Air to anyone looking for excellent service and a team you can trust.”

“Our A/C broke today and Green Core came out to our home in Santa Rosa and truly saved us. They took the time to troubleshoot the issue, figure out what was actually wrong, and got us headed in the right direction after a very stressful day. Beyond being knowledgeable, they were one of the nicest tradespeople I've ever met. Kind, patient, and genuinely caring. It's rare to find someone who is both really good at what they do and also such a genuinely good human. I cannot recommend Green Core enough.”

“Tony and the team were great at installing our new Harvest heat pump system. The communication has been great and the entire team was very respectful and helpful. There are some tradeoffs with heat pumps, and the team worked to help us understand them.”

“These guys are total professionals. They are experts and did a fabulous job removing our old gas furnace, getting rid of asbestos, installing a new heat pump, new duct work, new electrical work and moving our water heater.”

“Very happy with the service Rich at Green Core provided. Prompt and professional.”

“Richard was absolutely amazing to work with. From the moment he arrived, he was professional, friendly, and clearly knew exactly what he was doing. He took the time to explain the issue with my system in a way that actually made sense — which I loved.”

“Rich was on time and respectful. The A/C split system works great for our 2-story house. Thanks for the suggestion.”

“Such a pleasant experience from the initial phone call to the finished product. Zach took my call and was able to get his technician out the next day. Rich was very knowledgeable and got my system repaired the same day. Thank you Greencore!”

“Wow what a great experience! Rich was very professional. He was on time, wore shoe covers and treated me very well. I don't know much about heating and air but he explained everything very well. I'm nice and warm now and can't thank this company enough!”

“Great service! Rich was on time, polite and professional. Did good work in reasonable time and left our place as clean as he found it. The house is nice and warm again!”

“Can't say enough good things about Rich. His expertise was impeccable and his knowledge of our equipment was astounding. He kept my mind at ease by keeping me informed the entire service call. Now I have heat and couldn't be happier — thank you Rich!”

“Wow, Rich was a rockstar! He treated me and my home with the utmost respect. He is such a great person to deal with and was funny as well — what a bonus! I will definitely be recommending this company to all my family and friends.”

“Great service, great job, great price — 10/10. Finally got my go-to people for HVAC.”

“I was very impressed by Zach and Tony. They were quick and efficient at getting our A/C hooked up and running, even in the middle of a heat wave. Both made sure to cover their shoes when coming into our home and wash their hands.”

“The crew was very professional and respectful. They completed the installation as promised. Thanks for a warmer, more efficient heating and AC system.”

“Great customer service. Quick and clean A/C unit install.”

“Green Core is the real deal. Excellent, prompt and courteous service with fair pricing and great workmanship. A company that can be trusted. Highly recommended!”

“Tony and Zach were extremely helpful in giving us options for heating in our home. Their team of guys were professional and well trained, completing the job in a timely and orderly fashion. We are very happy with our new system and would highly recommend them to anyone looking for an honest HVAC company!”

“We have hired Zack for both a repair and a new install of a heating system. They were very professional, showed up on time, and completed both projects on time and for a good price. He was able to solve a long-time issue with my furnace.”

“Best in the business — the hardest working guys who do incredible work. Couldn't recommend them enough.”

“Thank you Green Core! Called during summer due to a broken AC on a 100° day. They showed up to the house less than a couple hours from the phone call and managed to fix the unit in no time. I was also interested in a quote for an upgrade and they were great about it.”

“Tony and Zach Milano are the absolute best at what they do. I recommend them 100%. They are both honest, intelligent, hard-working men. If you hire them for heating or air, you will be very satisfied by the work they do.”

“I don't give reviews like this lightly, but this company truly deserves it. I've worked with them for nearly 9 years, and the consistency, integrity, and quality they deliver is unmatched. They are incredibly knowledgeable, honest to the core, and always go the extra mile.”

“If I could give Green Core more than five stars, I absolutely would. Zach and Tony are professional, honest, and incredibly reliable. Their pricing is fair, communication is clear from start to finish, and the quality of their work is outstanding.”

“Called for some information and a quote and they were very kind and informative. When we are ready, we will be going with them!”

“They were wonderful! Fast, efficient, and fairly priced. Saved us from a cold winter!”