When your old system finally gives out, or a new build needs HVAC from scratch, you want it done right the first time. Onzone handles new system installs across the Bay Area: furnace, AC, heat pump, mini-split, residential or commercial.
NATE-certified technicians, manufacturer-direct equipment, line-itemized pricing. No surprises on quote day. No day-of upsells. Same-day written quotes.
Your older split system struggles to heat or cool evenly, and replacement parts are becoming harder to source.
Undersized equipment, poor airflow, or outdated ductwork can leave bedrooms hot even when the thermostat is satisfied.
Old furnaces and air conditioners often run longer than needed, using more gas and electricity than modern systems.
You need a contractor who handles load calculations, code requirements, permit paperwork, and eligible heat pump rebate documentation.
Every Onzone installer holds North American Technician Excellence certification — the industry’s strictest credential.
We come out, take measurements, run the numbers, and put a written quote in your hand — usually within the same business day.
Line-itemized quote covering equipment, labor, permits, and disposal. No mystery line items, no day-of surprises.
Most residential replacements (like-for-like) wrap in a single day. New ductwork, multi-zone mini-split systems, or commercial rooftop units typically run 2–3 days depending on scope. We give you an exact timeline in the written quote before any work starts.
Yes — we pull the mechanical permit before the install and schedule the city inspection at completion. The price you see in the quote includes both. You don’t have to coordinate anything with the municipality.
Carrier, Lennox, Trane, Mitsubishi, Daikin, Goodman, and Rheem — all the major manufacturers. We’ll recommend the best fit for your home’s size, climate exposure, and budget. Your final decision; our equipment partners.
