A furnace that is past saving should not take the rest of winter with it. Onzone runs furnace installation and replacement across the Bay Area: gas and electric, single stage to modulating, residential and light commercial. Every install starts with a Manual J load calculation so the new furnace matches the house, not a guess.
NATE certified installers, manufacturer direct equipment, permits pulled in every city we work. You get a written line item proposal the same day we visit, and the old unit leaves on our truck.
The heat exchanger, control board, or blower has failed on an aging unit and another repair no longer makes sense.
An old single stage furnace short cycles and burns more gas than a modern high efficiency unit doing the same job.
Undersized equipment or tired ductwork leaves bedrooms cold while the hallway thermostat reads satisfied.
A cracked heat exchanger or a failed safety control means the furnace should not run another season.
Most comfort complaints trace back to wrong sizing. We run the load calculation on every furnace installation and match AFUE rating, staging, and blower type to the house.
Condensing furnaces in the 95 percent AFUE class cut gas use hard, but they are not the right answer for every home or venting setup. We quote the efficiency tier that actually pays back in your house.
We pull the mechanical permit, schedule the city inspection, and commission the new furnace with a combustion safety check before we leave.
Most like for like furnace replacements finish in a single day, with heat back on that evening. Adding a furnace where ductwork or gas lines need changes runs longer, and the written proposal states the exact timeline before any work starts.
Rule of thumb: if the unit is 15 or more years old and the repair is a major component, replacement usually wins on reliability and gas use. Our furnace repair team lays out both paths honestly, and we do not commission sell replacements.
For many Bay Area homes, yes. A heat pump replaces the furnace and the AC in one electric system and qualifies for utility rebates gas equipment does not. See heat pump installation for the full comparison; we quote both when it is close.
AFUE is the share of gas that becomes heat in your house. Standard furnaces run around 80 percent; condensing models reach 95 percent and higher but need different venting and a condensate drain. We recommend the tier your home, venting path, and usage justify.
Yes. The mechanical permit and the inspection visit are included and coordinated by us in every Bay Area city we serve. You do not deal with the municipality.
Every quote is a written line item proposal covering equipment, labor, permit, and disposal, priced after the site visit and load calculation. You approve the exact scope before work starts, and the invoice matches the proposal.
