Heating & cooling
AC & HVAC repair in Atherton.
Estate HVAC for one ZIP code: multi-zone systems, hydronic radiant, and heat pump swaps done quietly.
Atherton is one ZIP, 94027, and almost nothing here runs on a single furnace. The houses carry two, three, sometimes four separate systems, often a mix of ducted zones upstairs and hydronic radiant in the main floors. A large share of this equipment went in during the early-2000s remodel wave, which means it is now fifteen to twenty-five years old and the failures are arriving on schedule: zone boards, dampers, heat exchangers, and condensers that were sized for a different efficiency era.
Working in Atherton also means working around the property. Equipment sits behind screening and landscaping, the town cares about noise, and nobody wants a condenser humming outside a bedroom window. When we replace outdoor units we spec low-sound models and we talk placement before anything is ordered.
We run the Mid-Peninsula from San Ramon on a regular route. EPA Section 608 Universal certified, CSLB #1136642. The diagnostic is $75, credited toward the repair when you book it, and every quote is written and itemized before work starts.
Multi-zone systems from the remodel wave
The typical Atherton call is one zone dead while the rest of the house runs fine. That points at the zoning layer: a stuck damper, a failed zone control board, or a thermostat that lost its link, and the fix is usually a fraction of what a full system replacement would cost. We diagnose the zone before we ever talk about the equipment behind it.
When a system from the early-2000s wave does reach the end, we replace it without disturbing the zones that still work. Matching new equipment to existing zoning and ductwork is most of the engineering on these jobs, and we put the load math in the quote so you can see how the size was chosen. See HVAC installation for how we run replacements.
Hydronic radiant: keep it, fix it, or pair it
A lot of Atherton main floors run radiant heat off a boiler, and done right it is the most comfortable heat there is. The usual failures are circulator pumps, zone valves, and manifold leaks, all repairable. A tired boiler does not automatically mean ripping out the floor loops. Often the right move is a new high-efficiency boiler, or a heat pump handling the ducted zones while the radiant stays on its own plant. We lay out both paths in writing with the tradeoffs, and you pick.
Heat pumps without the noise problem
Heat pump conversions are picking up in Atherton, usually during remodels when the gas equipment is due anyway. The objection we hear is noise, and it is a fair one on lots where the neighbors expect quiet. Modern variable-speed condensers from Mitsubishi and Daikin, both brands we carry factory training on, run quieter than most pool equipment. We site them away from bedrooms and property lines, mount them to kill vibration, and confirm the sound rating in the proposal before you sign anything.
Common questions, Atherton.
- One zone of my Atherton house stopped heating. Do I need a new system?
Usually not. One dead zone with the rest of the house working points at the zoning hardware: a damper, a zone board, or a thermostat link. Those are repairs, not replacements. We diagnose the zone first and give you a written quote for exactly what failed. The $75 diagnostic comes off the bill when you book the repair.
- Our house has three separate HVAC systems. Should we replace them all at once?
Only if they are all actually done. We inspect each system on its own and tell you in writing which ones have life left. Replacing one failed system while maintaining the others is normal here, and staging the work usually beats a single oversized project. When two are failing together there can be a case for doing them in one mobilization, and we will show you that math too.
- What does an HVAC service call cost in Atherton?
The diagnostic is $75 and it is credited toward the repair when you book it with us. You get a written, itemized quote before any work begins. We are EPA Section 608 Universal certified and CSLB licensed under #1136642.
Heating & cooling