Most of Concord went up between the 1950s and 70s, and a lot of it is on original heating and cooling. Onzone handles whole-system HVAC installation across the city.
We install across Concord, including the Todos Santos Plaza area, Ygnacio Valley, and Clayton Valley: furnace, AC, heat pump, and mini-split. Manual J sizing on every job, permits pulled, and a written proposal before anything is ordered.
Most of Concord was built between the 1950s and 70s, so full-system replacements are steady work as those first-generation furnaces and condensers give out, from the Todos Santos core through Ygnacio and Clayton Valley.
Concord runs hot inland, so sizing is the whole game here. A heat pump covers heating and cooling on one electric system and earns BayREN, PG and E, and BAAQMD rebates a furnace-plus-AC pair cannot, and we size it to that summer load and map eligibility on the quote.
You get a line-item proposal covering equipment, labor, permit, and disposal before anything is ordered. We pull the permit, handle the city inspection, and map any rebate you qualify for, so the price you approve is the price you pay.
If both are original and old, together is usually the smarter spend. We size them as a matched set and quote both options.
We evaluate it on the site visit. Often it is fine with sealing; sometimes a run needs replacing, and either way it is in the written proposal.
Yes, permit, inspection, and rebate paperwork are all handled by us.
Also in Concord: AC Installation, Heat Pump Installation, Furnace Installation.
