Onzone Heating & Cooling is a family-run HVAC and refrigeration company based in Pleasanton, California. We service the Tri-Valley, East Bay, and Bay Area for residential and commercial work.
No call center, no high-pressure sales, no commission-driven upsells. The same person who answers the phone is the one putting your job on the schedule.
Oleg founded Onzone after years working as an HVAC and refrigeration technician across the Bay Area. The company started with one truck and a focus that has not changed: honest diagnostics, fixed-once repairs, and a phone that gets answered by a real person.
Today, Onzone covers residential HVAC across the Tri-Valley and East Bay, plus commercial refrigeration and 24/7 emergency service Bay Area-wide. The values are the same as the first truck: show up fast, fix it right, charge what we quoted.
