Products & Brands
Navien Combi Boilers
One appliance for both space heating AND endless domestic hot water.
Navien's NCB-series combi-boilers are two appliances in one: a condensing boiler for radiant or hydronic space heating, PLUS an on-demand tankless water heater for showers, sinks, and dishwashers. Ideal for homes tight on utility-room space.
About Navien Combi Boilers
A combi-boiler is one of the cleverest pieces of residential HVAC equipment made: instead of a separate boiler for radiant heat AND a separate water heater, you get one wall-hung appliance doing both jobs. Navien's NCB series is a favorite of ours for Bay Area radiant homes — compact, high-efficiency, and one warranty covers both space and DHW.
What Air Synergy installs from Navien Combi Boilers
- NCB Series Combi
Wall-hung condensing combi-boilers, 95%+ efficiency.
- Domestic Hot Water Priority
Instant priority mode — hot water is ready when a tap opens.
- Wi-Fi Monitoring
NaviLink Wi-Fi remote monitoring and control.
Why homeowners choose Navien Combi Boilers
- Space heating and hot water from one small wall-hung unit
- One appliance, one warranty, one gas line
- 95%+ efficiency condensing technology
- Ideal for radiant-only homes without a separate water heater
Ready When You Are
Schedule your service today
Tell us what your home needs and our friendly, family-owned team will follow up to confirm your appointment. Prefer to talk it through? Call us — free estimates on new system installations and honest, expert advice you can trust.
Rated 4.94 / 5 across 181 Bay Area reviews
- Call us(925) 510-2037
- Emailinfo@airsynergy.com
- HoursMon–Fri 8:00 AM – 5:00 PM
Ruud Pro Partner & Mitsubishi Diamond Elite
Premium Ruud and Mitsubishi ductless & ducted heat-pump systems with best-in-class warranty coverage.
Decades of Combined Experience
Bay Area homeowners and businesses have trusted our family-run team to treat every property like our own.
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Background-checked, drug-tested, factory-trained technicians on every single job.
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No-obligation in-home estimates on new system installations and replacements.