From hillside tract homes to Eichlers with no duct space, Onzone handles whole-system HVAC installation across Castro Valley, matched to the house.
We install across Castro Valley, including Castro Village, the Lake Chabot area, Palomares Hills, and Five Canyons: furnace, AC, heat pump, and mini-split. Manual J sizing on every job, permits pulled, and a written proposal before anything is ordered.
Castro Valley mixes mid-century hillside homes with Eichlers that have no duct space. Eichlers usually mean a whole-home ductless system, while the tract homes take a standard furnace and AC or a ducted heat pump, and we do all three.
A heat pump or a multi-zone mini-split covers heating and cooling on one electric system and stacks BayREN, PG and E, and BAAQMD rebates. For a ductless Eichler, that is often the cleanest whole-home answer. We map the rebates 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.
A whole-home ductless mini-split system, which heats and cools room by room without duct space. See ductless mini-split.
If both are old, together is usually the smarter spend. We size them as a set and quote both paths.
Yes, permit, inspection, and rebate paperwork are all handled by us.
Also in Castro Valley: AC Installation, Heat Pump Installation, Furnace Installation.
