Best heating and air conditioning pros near Castro Valley, CA

"Of all the people I've had work on my home renovation in the last year, these guys were my favorite. Prompt, professional, honest, and reliable. When Duke came to give us the estimate, my 2 year old daughter wanted to give him a hug before he left which is unprecedented. That pretty much sealed the deal for us. They were also far and away the most reasonable quote we got. Even a friend quoted us $1500 more for less work. The installers were on time and knew their stuff. The install work is top notch as well. Everything in place and looks well put together. I highly recommend them to anyone looking for HVAC work."

"knowledgeable, professional, prompt and courteous, highly recommend, came out the first day, repaired the next, if hvac issues arise again they will be the ones I call"

"Global Comfort installed a full HVAC system in my home; 7 new runs for air, new AC unit, new furnace and a new Nest thermostat, all electrical needs. Rudy and his team are respectful, efficient, punctual, competitive in pricing. Rudy walked me through running the system for its first time and explained all the stuff for a brand new system in a house that never had AC. I'm very thankful for the work they did. Highly recommend because their customer service is top notch."

"Air Sharks are very professional and I think they did a good job on installing HP HVAC in our property."

At Duct Pros, we're proud to be a top-rated company on Angi Leads (formerly HomeAdvisor) and a five-star ranked service on Yelp, trusted by homeowners across San Francisco, San Jose, and the entire Bay Area. Our team of seasoned experts specializes in delivering precision air duct and chimney cleaning solutions, tailored to your home’s needs. \n \nWith years of experience, we’ve mastered the art of offering safe, cost-effective, and reliable services that guarantee cleaner, healthier air for your family. Whether it’s removing dust, debris, or harmful buildup, we take care of it all with unmatched professionalism. Trust Duct Pros to exceed your expectations every time!

*****669-669-2435*****We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.

"The first week of December we came home to a cold house. The thermostat was working, we could hear the furnace come on but no heat. We contacted Gas and Electric thinking the pilot had gone out. The technician came out and checked the furnace and the pilot was fine but the HSI had burnt out. He explained this part has about a 5 year lifespan. He let us know the part was roughly $25 to $50 and it would take about 15 minutes to change out - a very easy DIY job. We decided to have an HVAC technician come out as the furnace had not been serviced in  a couple of years. We called around to a couple of places  from the list and the quickest appointment was with Albert Nahman Heating and Plumbing. The tech was prompt and professional. He asked where the furnace was located and we explained  it was under the house and due to the recent rains it was a little damp under there. We explained that while we had a sump pump it was a little muddy in the entryway. He said no problem and grabbed a shovel and cleared the mud away and then went to work on the furnace.. He tested the furnace to make sure it really was just the HSI. He replaced the part and had us test the furnace turning on and off the thermostat a couple of times while he was there to make sure everything was working properly. He did let us know that it would be a good idea to schedule a complete cleaning of the furnace and ducts. He showed us the dust etc that was collecting and explained how that will shorten the lifespan of the parts.  The tech was fantastic. The only downside was the pricing. The $50 part was $325. If you are someone who is not good at DIY/ doesn't relish going into crawl spaces or under the house and needs a technician who will explain how everything works and what they need to do as well as what they recommend for future maintenance, then Albert Nahman Heating and Plumbing is reliable.
"

Galaxy Heating & Air Conditioning is a locally owned HVAC company proudly serving homeowners and businesses across the San Francisco Bay Area. We specialize in energy-efficient heating and cooling installations, heat pumps, furnace replacements, ductless systems, and indoor air quality upgrades. As authorized dealers for leading brands like Mitsubishi, American Standard, Carrier, Lennox, and Rheem, we deliver expert craftsmanship backed by manufacturer warranties.\n\nOur certified technicians handle every project with professionalism, from design and permits to testing and safety inspections, ensuring each system is code-compliant and built to last. Whether you need a seasonal tune-up, emergency repair, or complete comfort system upgrade, Galaxy provides honest service, transparent pricing, and dependable results.\n\nServing Pleasant Hill, Concord, Walnut Creek, Danville, Alamo, Oakland, Berkeley, Lafayette, Moraga, and nearby cities.

"These guys are just excellent! I made a few mistakes before I got lucky to find New Millennium HVAC. They were professional from the beginning to the end. Jose did a thorough job, cleaning the dryer vent. It was not a straightforward issue and I was afraid that we’d have to open the wall to cure the blockage. However, Jose was able to fix it. He’s an experienced professional excellent at his job, trustworthy and overall great to deal with. I’m a happy customer for years now and will rely on these guys for any HVAC related issues."

"Victor did a great job repairing our aging HVAC system. I highly recommend him and Chill—very fast service."