HVAC Contractor serving Rohnert Park, CA since 2013

JM HVAC has been serving homeowners and businesses across Marin County, Sonoma County, and San Francisco County since 2014. What started as a small operation built on honest work and personal accountability has grown steadily, one satisfied customer at a time. We are proud to be a locally rooted business that still operates with the same hands-on care we had on day one.

Our founder, Jeff McCulloch, built JM HVAC on a straightforward idea: do the job right, be honest about what it costs, and show up when people need you. Over the years, that approach has earned the trust of hundreds of homes and businesses throughout the Bay Area and North Bay. Every call we take is a chance to prove that commitment again.

We handle the full range of heating and cooling needs, from routine service and repairs to full system installations. Our work covers central air conditioning, furnaces and heaters, heat pumps, ductless mini splits, rooftop package units, boilers and circulating pumps, HVAC zoning systems, thermostats and controls, and gas and electric hot water heaters. Whether you need a quick fix or a complete system upgrade, we bring the same level of care to every job.

We work with both residential and commercial properties. A family in Petaluma dealing with a broken furnace in January gets the same attention as a property manager in San Francisco managing a multi-unit building. No job is too routine, and no situation is too urgent. We also offer emergency repairs when you cannot afford to wait.

Our hours are built around your schedule. We are available Monday through Friday from 5am to 6pm, and on weekends from 7am to 5pm. That kind of availability matters when your system goes down on a Saturday morning or you need to get a quote before the work week starts.

JM HVAC holds California Contractor License No. 1001595. That license represents more than a number. It reflects years of training, field experience, and a legal commitment to meet the standards California sets for HVAC work. You can hire us knowing the work will be done correctly and to code.

We are grateful for every customer who has trusted us with their home or business. If you are ready to schedule a service call, get a repair estimate, or talk through a new installation, give us a call at (707) 541-6921 or reach us by email at jeffmcculloch@jmhvac.net. We would be glad to help.