What we offer

Navien Heat & Hot Water Services

From a quick repair to a full installation, we handle every aspect of your Navien system — tankless water heaters and combi-boilers. All work is performed by a Navien-certified technician — no subcontractors, no guesswork.

Most repairs completed same day

Navien Repair

When your Navien stops working — or starts acting up — you need someone who knows the system inside and out. We diagnose the root cause quickly and fix it right the first time, using genuine Navien parts whenever possible.

  • Error code diagnosis and resolution
  • No hot water or inconsistent temperatures
  • Ignition and burner issues
  • Flow sensor and thermistor replacement
  • Heat exchanger cleaning and repair
  • Venting and gas line inspection
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Heat and hot water from one Navien unit

Combi-Boiler Service & Repair

Navien combi-boilers (NCB and NHB series) provide both home heating and domestic hot water in a single compact unit. When something goes wrong, you lose both at once. We specialize in diagnosing and repairing combi-boiler issues fast — so your home stays warm and your showers stay hot.

  • NCB and NHB series repair and service
  • No heat and no hot water diagnosis
  • Hydronic heating loop inspection
  • Zone valve and thermostat troubleshooting
  • Circulator pump service and replacement
  • Combi-boiler to radiant floor compatibility
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Protect your investment, extend its life

Annual Maintenance

A yearly tune-up is the single best thing you can do for your Navien — whether it's a tankless water heater or a combi-boiler. We flush the heat exchanger, inspect every component, test safety controls, and make sure your unit is running at peak efficiency heading into winter.

  • Heat exchanger descaling and flush
  • Inlet filter cleaning
  • Burner and ignition inspection
  • Venting system check
  • Safety controls and pressure test
  • Full performance report provided
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Done right from day one

New Installation

Upgrading from a tank water heater, old boiler, or replacing an aging Navien? We handle everything — proper unit sizing for your home, code-compliant venting, gas and water connections, and a complete walkthrough so you know your system.

  • Tankless water heater and combi-boiler installs
  • Unit sizing and model recommendation
  • Full removal of existing water heater or boiler
  • Code-compliant venting installation
  • Permit coordination (where required)
  • Owner walkthrough and system setup
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Clear answers, not more confusion

Error Code Diagnostics

Navien error codes can be cryptic and misleading. We run a thorough diagnostic to identify the actual root cause — not just the symptom — and give you an honest assessment before any work begins.

  • All Navien error codes diagnosed
  • Root cause analysis, not just code clearing
  • Written estimate before any repair
  • Combi-boiler and tankless models
  • NPE, NHB, NCB, and NFC series
  • Honest recommendation — repair vs. replace
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Authorized warranty repairs

Warranty Service

If your Navien is still under manufacturer warranty, we can perform authorized warranty repairs. We handle the documentation and work directly with Navien so you get the coverage you're entitled to without the runaround.

  • Navien manufacturer warranty repairs
  • Warranty documentation handled for you
  • Parts sourced directly from Navien
  • No voiding your warranty with non-certified work
  • Extended warranty service plans available
  • All Navien residential models covered
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Ready to schedule service?

Call us or submit a service request and we'll get back to you within the hour during business hours.

Call us directly

(781) 236-4234

Mon–Fri 7am–6pm · Sat 8am–3pm · Emergency available