Do you really drive to Sunnyvale from San Ramon

We do. From San Ramon it is 680 down through Fremont and Milpitas into Sunnyvale, the same South Bay corridor as Mountain View and San Jose. No travel fee, and the $75 diagnostic is waived with the repair.

Can a Navien work in my Eichler with no attic

For domestic hot water, yes, with the unit and venting placed to suit an Eichler's flat roof and exterior walls. I look at your specific layout first, because Eichler venting is constrained and I want to get the clearances right.

How often should I descale in Sunnyvale

Once a year for most homes, since the South Bay water is hard. With a working softener I check the output and may tell you that you can stretch it. I give you a straight recommendation based on what I find inside your exchanger.

NAVIEN · SUNNYVALE

Service · All Navien Models

Navien Tankless Water Heater Service · Sunnyvale, CA

Navien tankless service in Sunnyvale, from the 1950s Eichler and ranch tracts to the dense newer townhomes near downtown

$75 diagnostic (waived with repair)
Same or next-day best effort
CSLB #1136642

Call (925) 999-4095

Navien in Sunnyvale

Navien heating and cooling in Sunnyvale.

Sunnyvale runs from 1950s ranch homes and a handful of Eichler tracts to dense newer townhomes and condos near the downtown and the tech campuses. The Eichlers and flat-roof homes constrain venting, and the newer townhomes get sealed-combustion Navien units in tight utility spaces with builder recirculation. South Bay water is hard across all of it.

We service Navien condensing tankless throughout Sunnyvale. The climate is mild and bay-moderated, so the units do not fight hard freezes, but the hard water scales exchangers annually. My Sunnyvale calls are a mix of vent corrections on flat-roof homes, condensate cleanup in townhomes, and recirculation tuning.

ADRIUM checks the combustion and gas side that quick installs skip. On a Sunnyvale Eichler or flat-roof home, vent routing is constrained and I make sure the Navien intake and exhaust meet clearances rather than being forced into a spot where they recirculate exhaust.

Common repairs we do

What we close on the truck.

Flat-roof vent clearance faults. Sunnyvale Eichlers and flat-roof homes leave terminations on a low wall close to other openings, so the Navien recirculates its own exhaust and faults. I correct the termination location and clearances so intake and exhaust are separated and the unit draws clean air.
Condensate backing up in a townhome utility space. Newer Sunnyvale townhomes give the acidic condensate a poor drain path and it backs into the unit and faults the sensor. I re-run the drain with proper slope and a neutralizer where needed so it stays clear.
Heat exchanger scale on hard water. Hard South Bay water scales the exchanger and the tap temperature drifts and the wait grows. I descale annually with a pump and solution and verify flow and mixing after, adding isolation valves where the install left them off.

Models we service

Navien product lines.

Condensing tankless water heaters (NPE and KD series)
Combi-boilers (heat plus domestic hot water)
Condensing gas boilers for hydronic heat
Recirculation and ComfortFlow systems
Stainless heat exchangers and venting

Pricing and warranty

What it costs. What we stand behind.

$75

Diagnostic visit. Waived when you book the repair with us.
Written

90 days on consumables, 1 year on major parts, 2 years on sealed-system rebuilds. Quoted in writing before work starts.
CSLB

#1136642. Bonded and insured. We file warranty paperwork when applicable.

Recent work

Navien jobs we have closed.

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Nearby cities

Navien service in neighboring cities.

FAQ

Navien in Sunnyvale questions, answered.

Do you really drive to Sunnyvale from San Ramon

We do. From San Ramon it is 680 down through Fremont and Milpitas into Sunnyvale, the same South Bay corridor as Mountain View and San Jose. No travel fee, and the $75 diagnostic is waived with the repair.
Can a Navien work in my Eichler with no attic

For domestic hot water, yes, with the unit and venting placed to suit an Eichler's flat roof and exterior walls. I look at your specific layout first, because Eichler venting is constrained and I want to get the clearances right.
How often should I descale in Sunnyvale

Once a year for most homes, since the South Bay water is hard. With a working softener I check the output and may tell you that you can stretch it. I give you a straight recommendation based on what I find inside your exchanger.

Need Navien service in Sunnyvale?

Tell us what is broken. We will quote it.

Call (925) 999-4095