NAVIEN SERVICE SPECIALIST • TORONTO & THE GTA
Navien boilers, combi-boilers and tankless water heaters.
DAVESDUCTS is a Navien Service Specialist providing Navien installation, diagnostics, repair and maintenance in Toronto and the GTA. We work with the appliance and the mechanical system around it — including hydronic piping, pumps, zoning, controls, venting, gas supply, condensate and domestic-hot-water requirements.
NAVIEN SERVICE SPECIALIST
Navien-trained product familiarity matters when the system needs service.
Navien’s Service Specialist program recognizes participating companies as Navien Approved Installers and Service Providers. Navien also specifically recommends using a Navien Service Specialist for installation or repairs because of their familiarity with Navien products.
INSTALLATION
Navien Equipment
Equipment selection and installation based on the heating load, hot-water demand, gas supply, venting, piping, controls and actual project conditions.
DIAGNOSTICS
Navien Service & Repair
No heat, no hot water, fault codes, intermittent operation and performance complaints should be diagnosed before parts or equipment are replaced.
MAINTENANCE
Preventative Service
Maintenance can address combustion, heat exchangers, filters, condensate, venting, system operation and other applicable items according to the equipment and system.
CURRENT NAVIEN PRODUCT FAMILIES
Boiler, combi-boiler or tankless? Start with what the system needs to do.
Navien’s product lineup changes over time. DAVESDUCTS does not recommend equipment from an old model number alone; we determine whether the application needs space heating, domestic hot water, or both, then select from current equipment that fits the project.
BOILERS
Navien Condensing Boilers
Navien’s current residential boiler lineup includes NFB-H and NHB-H series equipment. Boiler selection should account for the building load, connected radiation, required water temperatures, piping and controls.
COMBI-BOILERS
NCB-H & NFC-H
Navien currently offers NCB-H and NFC-H condensing combi-boiler families that combine hydronic space heating with domestic-hot-water production in one appliance.
TANKLESS
Navien Water Heaters
Navien also offers current condensing and non-condensing tankless water-heater families for domestic-hot-water applications.
NAVIEN COMBI-BOILERS
One appliance for hydronic space heating and domestic hot water.
A combi boiler provides space heating while also producing domestic hot water on demand. The closed-loop heating water and potable domestic water remain separated through the appliance’s heat-exchange arrangement.
NCB-H
Navien NCB-H Series
A current Navien condensing combi-boiler family designed to provide hydronic space heating and domestic hot water. Exact model selection depends on the project’s heating and DHW requirements.
NFC-H
Navien NFC-H Series
Navien’s current NFC-H family provides another high-capacity combi-boiler option. The appropriate series should be selected from the actual system requirements rather than assuming larger equipment is automatically better.
IMPORTANT SIZING POINT
Domestic-hot-water demand and space-heating load are different calculations.
A combi boiler may require substantial input to satisfy domestic-hot-water demand, but that does not mean the building needs the same output for space heating. Proper equipment selection and control strategy should account for both loads.
NAVIEN BOILER DESIGN
The boiler is only one part of a hydronic system.
A high-efficiency boiler cannot compensate for poor circulation, incorrect piping, control problems or heat emitters that are mismatched to the system. Boiler replacement should consider the complete hydronic installation.
LOAD
Heating requirement.
Do not automatically duplicate the input rating of an oversized existing boiler. Equipment should be selected around the application and building requirements.
HYDRONICS
Piping, pumps & flow.
Circulators, piping arrangement, zoning, expansion components and flow all influence how the boiler operates and how heat reaches the building.
EMITTERS
Required water temperature.
Radiant floors, radiators, baseboards and hydronic air-handler coils can require different operating temperatures and flow conditions.
NAVIEN SERVICE & REPAIR
Start with diagnosis — not an error code and a parts list.
An error code can point toward a condition the control has detected, but it does not always identify the underlying cause by itself. DAVESDUCTS evaluates the equipment and relevant system conditions before recommending repair work.
No Heat
Boiler operation, controls, thermostats, zoning, circulators, system pressure and other relevant conditions may need to be checked.
No Hot Water
For combi and tankless equipment, diagnosis can include flow, temperature, controls, ignition, scale and other operating conditions.
Navien Error Codes
We diagnose the appliance and surrounding system rather than assuming an error code automatically means a particular component should be replaced.
Leaks or Pressure Problems
Hydronic pressure, expansion components, relief discharge, piping and appliance conditions can all contribute to symptoms around a boiler.
NAVIEN MAINTENANCE
Preventative service should match the equipment and system.
Navien boiler, combi-boiler and tankless maintenance is more than simply looking for an active fault code. The applicable scope depends on the appliance and installation.
BOILERS & COMBI-BOILERS
Hydronic Maintenance
Service can include operation and controls, combustion-related checks, accessible heat-exchanger areas, burners and ignition as applicable, pumps, expansion components, system pressure and temperature, venting, condensate and relevant hydronic-system conditions.
TANKLESS WATER HEATERS
Flush + Maintenance
Depending on water quality and equipment requirements, service can include heat-exchanger descaling plus inspection of filters, ignition, combustion, venting, condensate and overall operation.
CURRENT DAVESDUCTS PRICING
Tankless flush + maintenance.
$325 + HST for qualifying equipment originally supplied and installed by DAVESDUCTS.
$375 + HST for equipment installed by another contractor.
Boiler and combi-boiler maintenance is quoted according to the equipment, hydronic configuration and required scope.
NAVIEN INSTALLATION
Replacing equipment? Evaluate the mechanical room before selecting the model.
A Navien installation can involve much more than mounting the appliance. The existing gas service, venting, condensate, hydronic piping, domestic-water piping, pumps, expansion tank, controls and electrical requirements should be considered before the project is finalized.
1 • ASSESS
Existing System
Review the existing boiler or water heater, piping, zones, heat emitters, gas supply, venting and mechanical-room conditions.
2 • SIZE
Heating & Hot-Water Requirements
Determine the relevant space-heating and domestic-hot-water requirements rather than simply matching the old appliance.
3 • DESIGN
Piping, Venting & Controls
Plan the appliance together with the distribution system, controls, condensate, venting and other required mechanical work.
4 • COMMISSION
Test the Finished System
Verify proper operation and applicable combustion, control, hydronic, domestic-water, venting and condensate functions before the project is considered complete.
BOILER, COMBI OR TANKLESS?
Choose the equipment based on the job it needs to perform.
BOILER
Space Heating
For hydronic space-heating systems where domestic hot water is handled separately.
COMBI-BOILER
Heating + Domestic Hot Water
For suitable applications where one appliance will provide both hydronic space heating and domestic hot water.
TANKLESS
Domestic Hot Water
For applications primarily requiring on-demand domestic hot water without hydronic space heating from the same appliance.
NAVIEN FAQ
Common questions about Navien service and equipment.
Is DAVESDUCTS a Navien Service Specialist?
Yes. DAVESDUCTS is a Navien Service Specialist providing Navien boiler, combi-boiler and tankless-water-heater installation, diagnostics, repair and maintenance in Toronto and the GTA.
What is a Navien Service Specialist?
Navien’s NSS program recognizes participating companies as Navien Approved Installers and Service Providers. Navien recommends using a Navien Service Specialist for Navien installation and repair because of their familiarity with the products.
Does DAVESDUCTS repair Navien equipment installed by another contractor?
Yes. DAVESDUCTS can diagnose and service Navien equipment installed by others. Diagnostic labour, repairs and parts are handled according to the actual service required and any applicable manufacturer warranty.
What Navien combi-boilers are currently available?
Navien currently lists the NCB-H and NFC-H residential condensing combi-boiler families. Product availability and model specifications can change, so DAVESDUCTS confirms current equipment when preparing a project.
What is the difference between a Navien boiler and a Navien combi-boiler?
A boiler is primarily used to heat water for a hydronic space-heating system. A combi-boiler combines hydronic space heating with on-demand domestic-hot-water production in one appliance.
Can a Navien combi-boiler supply radiant floor heating?
A properly selected and designed combi-boiler can be used with compatible hydronic heat emitters, including radiant-floor systems. The system must be designed around the required load, flow and water temperatures.
Can a Navien boiler work with radiators or baseboards?
Yes, depending on the specific system design. Navien identifies applications including fin-tube baseboard, cast-iron baseboard, radiant floors, fan coils, radiators and air handlers. Existing emitters and required water temperatures should be evaluated when replacing a boiler.
Does DAVESDUCTS provide Navien service in Toronto and the GTA?
Yes. DAVESDUCTS provides Navien installation, diagnostics, repair and maintenance across Toronto and the Greater Toronto Area.
NAVIEN SERVICE SPECIALIST • TORONTO & THE GTA
Need Navien boiler, combi-boiler or tankless service?
Send us the model number, photos of the equipment and a description of what the system is doing. For replacement projects, DAVESDUCTS can assess the appliance together with the mechanical system it serves.
