Get matched with top air conditioning pros in Novato, CA

When homeowners want a reliable heating or air conditioning system that they don't have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.\n\nAt One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time - guaranteed.

"Ricardo was incredibly attentive and punctual. He was very honest about what needed to be done and he arrived on time as agreed upon and did an immaculate job. Would highly recommend him for any heating or air jobs. Thank you, Ricardo, for giving us heat again during this very cold winter!"

Climate Services Heating and Air Conditioning is dedicated to providing reliable, high-quality heating and cooling solutions tailored to every home. We specialize in energy-efficient systems designed to maximize comfort while reducing utility costs. From advanced heating and air conditioning installations to home ventilation, dehumidification, and cleaner air solutions, we focus on creating healthier, more comfortable indoor environments for you and your family.\n\nOur mission is simple: deliver exceptional workmanship with efficiency and precision, while helping homeowners find the right solution for their unique needs. At Climate Services, we combine expertise, innovation, and attention to detail to ensure every project is completed to the highest standards—so you can enjoy cleaner air, better comfort, and peace of mind year-round.

"I highly recommend Charlie Nelson's company next level heating and air conditioning. He had to make an extra trip to Home Depot for $2.00 part and he did not add that to his original quote of $309. The $309 included his labor and time. That's what he originally quoted and he stuck to it."

Enviro Heating & Air Conditioning Inc. is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.\n

"My experience with heating and air conditioning repair, replacement, and new installation was excellent. Their staff was amiable, well-informed, and meticulous. Our device is operating more efficiently than before. Really trustworthy service!"

"Furnace replacement was excellently installed, and thus far has worked to perfection. I would highly recommend Red Mountain Heating and Air."

Since 1999, Hassler Heating and Air Conditioning has helped East Bay homeowners stay comfortable with energy-efficient heating and cooling solutions built to last. We specialize in full system replacements, heat pumps, ductless mini-splits, and high-performance home upgrades designed to lower energy costs and improve year-round comfort.\n\nHomeowners choose Hassler for honest recommendations, expert system design, and clean, professional installations. Whether you need a fast repair or a complete system upgrade, our team focuses on long-term solutions—not quick fixes.\n\nServing Alameda, Contra Costa, and Marin counties, we’re committed to doing the job right the first time, with quality workmanship you can trust.\n\nCall today for expert service and a smarter, more efficient home.

"Jim's Air Systems had the best value for my dollar. They supplied me with better equipment than they quoted for the same price. They completed the entire installation in about five hours. They protected my floors with tarps and were very careful to protect my walls as they moved equipment in and out. Josh, the son of the original Jim, was on the job working with the other two installers. They performed above my expectations. They left my home and yard as clean as if they had never been there. The new furnace is wonderful and is already saving me money on my P.G. & E. bill. I would recommend Jim's Air Systems unconditionally to anyone in need of a new furnace and AC system. This is a family business that has been supplying and installing systems since 1976. They take personal pride in doing an excellent job. They did not sell me anything that I did not need and provided me with a much cleaner and easier-to-service installation than my existing system. They are the best!"

"Moore services my HVAC every six months. The crew that came out for my recent call, have been to my house before. Nice to see familiar faces. My main sewage drain clogged in front of my house at 4:50 pm. I called Moore and you’re team came out in 30 minutes. The crew had it unclogged at 5:40 pm. I couldn’t believe it. I was considering taking my family to a hotel. With that clog, staying in the house was not possible. You guys are awesome!!!"