NTI BOILERS • TORONTO & THE GTA
NTI boiler installation, service and hydronic system support.
DAVESDUCTS installs, diagnoses, services and maintains NTI boiler systems for residential and light-commercial applications. We evaluate the boiler together with the hydronic piping, pumps, zoning, controls, heat emitters, venting, gas supply and domestic-hot-water requirements that affect how the complete system performs.
CURRENT NTI EQUIPMENT
NTI offers multiple boiler platforms — the right choice depends on the application.
NTI’s current residential gas-boiler lineup includes several wall-hung and floor-standing platforms. DAVESDUCTS selects equipment around the actual heating load, connected radiation, water-temperature requirements, domestic-hot-water demand, piping and mechanical-room conditions rather than choosing a boiler from input rating alone.
FIRE-TUBE
FTVN Series II
A current high-efficiency wall-hung NTI boiler platform using a vertical fire-tube heat exchanger. NTI offers heat-only and combination configurations within the Series II family.
WATER-TUBE
TRX Series II
NTI’s current TRX Series II platform uses a water-tube heat exchanger and is offered in heat-only and combi configurations, depending on model.
FLOOR-STANDING
NTI Compass Series
A current high-efficiency floor-standing boiler option for projects where a floor-mounted configuration is appropriate.
PRODUCT LINEUPS CHANGE
We confirm the current model before specifying equipment.
NTI continues to update its boiler lineup. DAVESDUCTS uses current manufacturer documentation when preparing a project rather than relying on specifications from older or discontinued boiler families.
BOILER OR COMBI?
Space heating only — or space heating plus domestic hot water?
The first equipment decision is what the appliance needs to do. A heat-only boiler serves the hydronic heating system, while a combi configuration can combine hydronic space heating and domestic-hot-water production in one appliance.
HEAT-ONLY BOILER
Hydronic Space Heating
A heat-only boiler can serve radiators, baseboards, radiant floors, hydronic air handlers and other properly designed hydronic emitters. Domestic hot water can be handled separately or through a compatible indirect-water-heater arrangement.
COMBI BOILER
Heating + Domestic Hot Water
A combi configuration can produce domestic hot water while also serving the hydronic heating system. Equipment selection must consider the building’s heating load and its domestic-hot-water demand as separate requirements.
PROPER BOILER DESIGN
A new NTI boiler should be designed around the system — not simply matched to the old nameplate.
Boiler replacement is an opportunity to evaluate whether the existing equipment was correctly sized and whether the piping, pumps, zoning and heat emitters support efficient operation of the new boiler.
LOAD
Building heating requirement.
Existing boilers can be oversized. Replacement equipment should be selected around the application rather than automatically duplicating the old input rating.
TEMPERATURE
Match the heat emitters.
Radiant floors, radiators, baseboards and hydronic coils can require different supply-water temperatures and flow conditions.
DISTRIBUTION
Pumps, piping & zoning.
The boiler must work with the circulators, valves, piping arrangement, controls and zones that distribute heat through the building.
NTI SERVICE & REPAIR
An NTI fault code is a starting point — not the entire diagnosis.
When an NTI boiler locks out, loses heat or behaves intermittently, DAVESDUCTS evaluates the appliance and relevant hydronic-system conditions before recommending replacement parts or major equipment work.
No Heat or Boiler Lockout
Diagnosis can include ignition, combustion, controls, system pressure, thermostats, zoning, pumps and other conditions relevant to the complaint.
NTI Error Codes
Error history and current faults are useful diagnostic information, but the underlying operating condition should be verified before assuming a component has failed.
Pressure or Relief Problems
Expansion tanks, fill components, relief devices, system pressure and temperature can contribute to abnormal pressure or discharge.
Uneven Heating
If the boiler operates but some zones do not heat properly, the problem may involve circulation, zoning, controls, air, flow or the heat emitters rather than the boiler itself.
NTI BOILER INSTALLATION
The mechanical room should be assessed before the replacement boiler is selected.
A boiler project can involve gas piping, venting, condensate, hydronic piping, pumps, expansion components, controls, electrical work and changes to the existing distribution system. Those requirements should be identified before the final equipment and installation scope are established.
1 • ASSESS
Existing Equipment & System
Review the boiler, connected radiation, zones, piping, pumps, controls, gas supply, venting and mechanical-room conditions.
2 • SIZE
Heating & DHW Requirements
Determine the appropriate heating capacity and, for combi applications, account separately for domestic-hot-water demand.
3 • DESIGN
Hydronics & Controls
Plan the piping arrangement, circulation, zoning, water temperatures, controls, venting and condensate requirements around the selected equipment.
4 • COMMISSION
Test the Completed System
Verify operation, controls, combustion and relevant hydronic functions so the boiler and distribution system operate together as intended.
DOMESTIC HOT WATER
NTI offers more than one way to integrate domestic hot water.
Depending on the application, domestic hot water can be handled by a combi boiler or by a heat-only boiler paired with an appropriate indirect water heater or storage solution.
COMBI
Integrated DHW Production
Selected NTI boiler models are available in combi configurations that provide hydronic space heating and domestic hot water from one appliance.
INDIRECT
Boiler + Indirect Water Heater
NTI’s current water-heating lineup includes indirect and storage options such as the S20W and Trin & Stor families. A separate indirect can be useful where storage and recovery characteristics better match the home’s hot-water demand.
NTI + HYDRONIC AIR HANDLERS
A boiler can also provide heat for a forced-air system.
In a properly designed application, an NTI boiler can supply heated water to a hydronic air-handler coil. The air handler then uses a blower and ductwork to distribute heat through the home.
WHOLE-SYSTEM DESIGN
Water-side performance and air-side performance both matter.
The boiler must provide the required water temperature and flow, while the air handler and duct system must provide the required airflow. Coil pressure drop, blower performance, return-air capacity, supply ductwork and static pressure remain important.
NTI BOILER MAINTENANCE
Preventative maintenance should include more than a visual check.
The appropriate scope depends on the NTI model and hydronic system. Boiler maintenance can include operation and controls, thermostat and zoning review, accessible heat-exchanger and combustion-area inspection, burners and ignition as applicable, gas pressure and combustion, pumps, expansion tank, relief and safety components, pressure and temperature, accessible piping, venting, condensate and glycol condition where relevant.
MAINTENANCE PRICING
Boiler maintenance is quote-based.
Hydronic systems vary substantially in equipment, zones and configuration, so DAVESDUCTS quotes boiler maintenance according to the boiler and required scope.
EXISTING NTI BOILERS
Older NTI equipment can still be serviced even when a product family has been discontinued.
NTI maintains documentation for discontinued equipment. If you have an older NTI boiler, send DAVESDUCTS the model and serial information along with photos and a description of the problem so we can determine the appropriate service approach.
OLDER MODELS
Do not assume an older model is still part of NTI’s current lineup.
NTI currently identifies several legacy families as discontinued, including older TFT, Tx and FTV equipment. Replacement recommendations should therefore be based on current products and the existing system rather than automatically specifying the old model again.
NTI BOILER FAQ
Common questions about NTI boilers and hydronic heating.
Does DAVESDUCTS install NTI boilers?
Yes. DAVESDUCTS installs NTI boilers for suitable residential and light-commercial hydronic applications in Toronto and the GTA. Equipment is selected according to the heating requirement, system configuration and project conditions.
Does DAVESDUCTS repair NTI boilers installed by another contractor?
Yes. DAVESDUCTS can diagnose and service NTI boilers installed by others. The required repair depends on the equipment, fault and surrounding hydronic system.
What NTI boilers are currently available?
NTI’s current residential gas-boiler lineup includes platforms such as TFTN, FTVN Series II, TRX Series II and NTI Compass, along with other current models. Availability and specifications can change, so DAVESDUCTS confirms current equipment when preparing a project.
What is the difference between the NTI FTVN and TRX?
They are different NTI boiler platforms using different heat-exchanger designs. The FTVN uses a vertical fire-tube design, while the TRX uses a water-tube heat exchanger. The better choice depends on the specific system and project rather than the heat-exchanger type alone.
Does NTI make combi boilers?
Yes. Current NTI product families include combination models that provide hydronic space heating and domestic-hot-water production. The correct model should be selected around both loads.
Can an NTI boiler work with radiant floor heating?
Yes, when the hydronic system is properly designed. Radiant-floor applications require appropriate water temperatures, flow, controls and piping for the building and floor assembly.
Can an NTI boiler work with radiators or baseboards?
Yes. Existing radiators and baseboards can be served by a properly designed boiler system, but their required water temperature and output should be considered when selecting and configuring a replacement boiler.
Should I replace my NTI boiler because it has an error code?
Not automatically. A fault code is diagnostic information, not by itself a reason to replace the boiler. The equipment and relevant system conditions should be diagnosed first.
How much does NTI boiler maintenance cost?
DAVESDUCTS quotes boiler maintenance according to the equipment and hydronic-system configuration because the required scope varies between systems.
Does DAVESDUCTS provide NTI boiler service in Toronto and the GTA?
Yes. DAVESDUCTS provides NTI boiler installation, diagnostics, repair and maintenance in Toronto and the Greater Toronto Area.
NTI BOILER SERVICE • TORONTO & THE GTA
Need an NTI boiler repaired, maintained or replaced?
Send us the NTI model number, photos of the equipment and mechanical room, and a description of what the system is doing. DAVESDUCTS can assess the boiler together with the hydronic system it serves.
