Our new Nest thermostat wasn't registering the power source from HVAC. Ali came over and found a blown fuse and cleaned out the thermostat wiring and helped with the set up. Ali was very professional and finished the job quickly. read more

Came out quick and solved our AC issue very quickly. Fast, friendly service and no hard selling for upgrades just assess and repair. Will be using Otter for all our AC and heating needs 100% read more

OTTER HVAC - AC unit - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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I had three reputed and well-reviewed companies give me quotes for replacing my 35 year old gas furnace (with a newer gas furnace). Otter HVAC gave me the best quote and Ali was a pleasure to interact with. He also travels with treats for dogs, which earned him many brownie points in my household. Roman and Mike came to do the work soon after. They did a great job, explained what they needed to do, and problem-solved to accommodate my old home with it's various idiosyncrasies. They cleaned up behind themselves and were very professional and pleasant. I'm happy to have worked with Otter. If there is no update to this review, that means I haven't needed any follow-up service from them. read more

If you're like me and have collected eight or more quotes from reputable HVAC companies but still can't decide who to trust, stop what you're doing and read my review. I spent nearly two years researching top-rated HVAC companies across the Bay Area and never felt fully comfortable committing to any of them, until I found Otter HVAC. They were thorough, patient, and took the time to answer every question I had (both reasonable and overly neurotic). On top of that, their pricing was fair and the quality of work was excellent. I had a 3-ton heat pump installed because I was tired of waking up to a 50-degree house in the winter. My old wall furnace wasn't cutting it and didn't feel particularly safe running it through the night. My project involved new ductwork, new cut-ins, and the full heat pump installation. If you get Vlad as your lead installer, consider yourself lucky. He and Mike were fantastic: efficient, professional, and communicative throughout the entire process. Give them a call, I promise you won't regret it. read more

Outstanding service from start to finish! Getting connected with Derick was seamless, and the installation team was top-notch. Huge shoutout to Vlad and Tony for their incredible work installing our AC heat pump. They were professional, determined to get everything set up perfectly, and went completely above and beyond. On top of the amazing service, their pricing is highly competitive. Highly recommend! read more

Ali was able to fixed my AC issues last year with a capacitor. Unfortunately, this Spring, my grandpa unit has finally decided to go to AC heaven. Fortunately, I was able to call Otter HVAC. They were able to get me a quote right away, and work started shortly. Quote was very reasonable and explain clearly what was going to be done. The office checked in with us multiple times. Their technicians were great, on time, clean, and true professionals. Happy with my new HVAC units and happy to be a reference for these guys any day. read more

OTTER HVAC - New units - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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Our HVAC broke down earlier this week. Ollie as the owner was very prompt at responding to our request, give us a fair quote, and performed the service within the same week. Service was excellent. Great communication throughout the process. read more

OTTER HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

They are really prompt with communication and the prices are extremely reasonable when compared to other HVAC companies. I was able to get scheduled with relative ease after a few questions, for once I wasn't talking with an AI bot. I was looking to update my thermostat and had already made the purchase. I had a few other quotes where the company was pushing to buy something from them and they'd install it. OTTER simply quoted me a price and set up the time. Ali was running a little late, understandably since it was hot as heck, but once he got here he had the new thermostat installed and up and running within about 30 minutes. I am one happy customer! read more

OTTER HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Have you ever talked about getting AC for your home & every year you sweat through the summer with strategically placed fans trying to cool off? Well, it's time to take the jump like we did. Otter HVAC is amazing! Ali & Derrick came to our home for the initial discussion. They were friendly, professional & absolutely no pressure sales. Installation was a breeze. Tony, our installer, was meticulous & very respectful of our home. Otter HVAC offers great pricing, seamless installation & unmatched professionalism. Don't put off living cool & comfortable, give Otter HVAC a call. read more

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Olly was fantastic. He scheduled an appointment within 24 hours. Showed up in the window. Diagnosed and fixed the problem in less than an hour. He even hung around for a bit to make sure there weren't other issues. Recommend highly read more

OTTER HVAC - Repaired AC units - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

The service itself was very quick, friendly and super helpful! Learned how the system worked and communication about when they would arrive was clear and update. Even got a cat treat, which was very kind. read more

OTTER HVAC - Wall heater - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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Our HVAC filter was inaccessible, not allowing us to easily change the filter. Turns out that some of the electrical wiring was also in the way. Ali did a superb and thorough job of fixing everything that needed to be done. read more

OTTER HVAC - New sliding door installed for easy filter access - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Otter HVAC was very quick and responsive to my issue. They were able to come take a look at my unit the same day.

I used Otter HVAC for a much larger job than my first one, this time I had an air conditioning unit installed in my attic. They were much more affordable than other quotes, did the job quickly and efficiently and took care of the small things like registering the unit for the warranty coverage. I'd highly recommend them and will be using them for future electric or hvac needs. read more

Amazing. Quick visit and repaired ac in an hour. Low pricing relative to competitors. Extremely great service and friendly technician. Much better result than with competitor who wanted to charge 3x more for supposed Freon leak that wasn't there. This is an extremely honest and upfront company. Highly recommended! read more

OTTER HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Reached out to these guys in the morning and by 2pm same day the boss Ali came out to diagnose and fix the issue same day. Honest assessment and really fair pricing. We used a lot of HVAC companies but these guys are the best ! Highly recommended A+++ read more

OTTER HVAC - Nest Smart Thermostat - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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I came across Otter HVAC while shopping for a heat pump system and Ali came out promptly as scheduled to provide me with options for how I can upgrade my current system. He was friendly, knowledgeable, and courteous. The air handler doesn't fit my closet but I'm calling Otter for anything related to my existing system in the future! read more

Ali and team came in promptly and helped me understand the actual issue with the airflow on two floor house. They rightfully diagnosed the issue and provided a detailed explanation and solution. I had already talked to another company in the area which was trying to trick me into buying an expensive solution. So I am glad that I found otter. read more

OTTER HVAC - With Ali from Otter - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Ali from otter came and found that we needed refrigerant and helped with that. Very friendly and definitely recommend. read more

OTTER HVAC - Ali from otter came and found that we needed refrigerant and helped with that. Very friendly and definitely recommend. - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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These guys were awesome!! They were so fast to respond and get the job started. Our house is so old there were many issues they had to deal with, but they didna great job. Between old gas lines, odd flooring and refinished ventilation there were ao many issues, but Otter HVAC took care of everything. They were competitive priced, professional and friendly. I couldn't be happier. read more

OTTER HVAC - Floor mounted heater - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Thank you , Otter HVAC. Our heat pump system kept us warm this winter and quickly cools us now when needed. Everybody in the company is highly competent, helpful, responsive, and friendly, so it was an actual pleasure to work with you from start to finish. I feel good knowing you'll quickly take care of any problems that might come up down the road, and I've recommended your company to friends and neighbors. read more

Ali, who owns the company, came out after I called on Friday, the earliest appointment that worked for me was today, but they could have come earlier. They responded super quickly and were very informative. They told me the price to come out, and Ali arrived. They responded very quickly when I called their offices. He unclogged my AC and showed me what was going on, explained what the issue was, and explained the services they offer. Very Professional and polite. Steve, with whom I talked on the phone, was very friendly and nice and quick to call me back. Overall Great company and very friendly owner and staff. Will use them again when I need to do more work on HVAC, but they also do Electric work! Highly recommended read more

OTTER HVAC - Ali and I after a good well done! - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Otter HVAC clearly prioritizes customer service. I needed cleaning of my gas wall heater and they quickly gave me a fair quote. On inspection they found it needed replacement, all the while being very courteous with clear explanations. I received lower quotes, but after researching the company and my positive experience, I chose Otter. Again, they were courteous and respectful during the replacement, leaving the area well cleaned up. They did a great job on the replacement and our interaction. Highly recommended. read more

OTTER HVAC - Gas top-vented wall heater. - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Ollie just left my home. My nest was losing power and not charging. He connected a new wire and refused to charge me - said it was the easiest job he would do this week. I'm a little embarrassed for calling a pro to do something so easy, but he got into the attic and looked at the wiring on both my furnace and the thermostat unit - and I just wasn't comfortable messing with the electrical myself. Anyway, I couldn't be happier! He showed up on time. Wore shoe protectors. Was professional and communicative. Was in and out in 30 minutes. Thank you so much!! read more

Ali and his team were the most responsive company when I reached out for furnace repairs. They were able to come out on the same day, were kind and courteous in my home, worked efficiently and resourcefully to diagnose and fix the problem. Great experience with wonderful guys! read more

OTTER HVAC - Job done - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

We cannot say enough good things about Otter HVAC! They came through for us during an emergency situation when my elderly in-laws' Carrier Infinity HVAC system suddenly stopped heating their home. We were worried given their age, health (cancer chemo) and the cold weather, but Otter HVAC responded immediately and treated the situation with real urgency and care. From the moment we called, their communication was clear, prompt, and reassuring. Ali arrived quickly the next morning, diagnosed the issue with the Carrier Infinity system right away (clogged filter caused the Carrier system to auto shutdown), and had the heat restored before things became unsafe. They were incredibly professional, knowledgeable, and patient in explaining what went wrong and what we should keep an eye on going forward. Ali even showed me where to find the Carrier error codes on the inside the furnace panel door. What really stood out was the compassion they showed for my in-laws--kind, respectful, and genuinely focused on making sure they were comfortable and safe before leaving. We are incredibly grateful for Otter's fast response and outstanding service. If you need an HVAC company you can trust--especially in an emergency--Otter HVAC is the one to call! Highly recommended. Cannot wait to have Otter help us with our desire to install a heat pump in our home in 2026. Thanks again Ali! read more

Great guys, great work. Friendly, professional, thorough with high attention to detail. I had a much needed overhaul of my duct system -- all my ducts were moved from the crawl space and discarded (due to rodent contamination) and new ones were reinstalled in the attic. They did everything to code and caught a few things that needed to be brought up to code, which I was grateful for. You can tell they take a lot of pride in their work. Competitive pricing. Highly recommend. read more

Ali and his crew were very friendly and professional. I had my 38 year old heating and air system totally removed and a new Mitsubishi Electric Heat Pump system installed, including new under the house ductwork. Very hard workers and I was very pleased with the finished project. I would reccomend them to anyone wanting a new HAVC system. read more

OTTER HVAC - inside unit - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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Ali came over to evaluate my HVAC unit and I am unbelievably impressed. I wanted a second opinion after another company that I have trusted with regular, yearly HVAC upkeep / cleaning quoted "maintenance" repairs of 7K. I decided to call Otter for a second opinion due to their amazing reviews. I am glad that I did. Ali said everything is fine and no repairs are needed. He knew that I would pay a reasonable fee for any necessary maintenance. He went with honesty and integrity. This is why Otter has five stars. I will recommend Ali and his Team to my friends and parents and Otter deserves these incredible reviews. Here's another. Thanks for everything, Ali. Honesty, integrity and providing real value leads to Otter's well-deserved success. I look forward to seeing this winning Company continue to shine. read more

Highly recommend! We replaced our old gas furnace with a new heat pump. The entire process was very easy, seamless. Pricing was very competitive and they stand behind the service they provide. Great company if you're looking to upgrade your homes HVAC system! read more

The team at Otter HVAC were a pleasure to work with. When my kitchen vent ducting needed repair, Ali came and provided a quick and reasonable estimate. Mike came later that day and fixed not only the problem I saw, but also a loose connection higher up. Look no further for your HVAC needs! read more

OTTER HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

I had a good experience hiring Otter. They were transparent about pump options and pricing. They were able to work around my availability. They even came for a follow up to ensure there is no leak. Overall I believe they are honest and hardworking folks, I would hire them again if need arises. read more

I asked for a bid to install a split a/c in one room. I shopped prices for the unit and found a cost of &1500-$2000. The quote I received for the unit and installation, that entailed 2 days of labor, was $12,000!! read more

Super happy with Otter and the entire team. They replaced our furnace right during the cold snap as ours went out and we were desperate. They made it all so easy and the price was right! I will definitely use them for all of their services in the future if/when needed. read more

I'd a great experience with Otter HVAC. Roman came out to view my projects and he was very professional, and quoted a good price. Nate came to do the project and he was very friendly, worked efficiently and completed the job beyond my expectations. I finally have 2 TVs with no visible electrical wires and they look so much better now. The only thing I needed to do was spackle and paint. read more

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If you're even thinking about HVAC work, stop what you're doing and call Ali and his team at Otter HVAC. We were exploring adding A/C to our existing central heating system--simple enough--until we got hit with quotes suggesting we'd need to replace the furnace too. Then Ali showed up. Instead of upselling, he educated us. He walked us through our entire system, pointed out that a new furnace wasn't necessary, and found smart, cost-effective fixes--like new circuit breakers and upgraded motors--that would get us the performance we needed without the extra expense. He gave us the most reasonable bid, but here's the kicker: our house turned out to be a total wildcard. Let's just say it was built with...creative freedom, not architectural foresight. The job was way more complicated than expected, but Ali didn't blink. He stayed late to make sure our heating was back up and running that same day, and then came every day for a week to help us tune the system until it ran like a dream. Kind, calm under pressure, and clearly operating at a level of competence most HVAC folks can only aspire to--Ali's the real deal. Otter is now our go-to for HVAC, and we've already recommended them to our HOA. Bottom line: if you're in a jam, do yourself a favor and let Otter HVAC help you out. You'll wish you had called them sooner. read more

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Great Service! My wall heater died during the start of the cold season, and I could not figure out why it wouldn't stay lit. After trying and failing to tackle the problem myself, I decided to hire some help. I reached out over the weekend, and Ali was able to schedule me in the following Monday. The service was great, and they got my heater up and running again! read more

OTTER HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Careful advice, amazing service, great explanations of choice and options. Highly recommend.

I had furnace that was making more noise then it should have and wasn't staying on for more than a few seconds. I contacted Otter to come take a look and was able to schedule an appointment within a day. The technician came out, identified the issue, fixed it without requiring any parts, and then stayed for about 20 minutes to make sure there were no further problems. Communication was easy throughout and I would call them again next time I have a HVAC issue! read more

On June 6, 2025, Ali and Tony from Otter HVAC came out to fix my air-conditioning/heating unit -- and I am beyond impressed. After two YEARS of ongoing issues and 15 work orders through my apartment building with no real fix, Ali and Tony had everything up and running in just an hour and a half. They were professional, respectful, and clearly knew what they were doing. After so much frustration and waiting, it was a huge relief to finally have the issue resolved -- and so quickly! I can't thank them enough. If you need HVAC help, don't waste your time elsewhere -- call Otter HVAC and ask for Ali and Tony. They're the real deal. read more

OTTER HVAC - Ali & Tony Otter HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California