Navien is a global leader in high efficiency water heaters and boilers for both residential and commercial applications. Navien’s condensing tankless technology provides top of the line tankless water heating services, ensuring on demand hot water that never runs out.

When a hot water tap is opened the unit detects the flow.
The flow sensor activates to determine the amount of hot water needed.
The igniter activates.
The gas control valve opens to supply the correct amount of gas.
The fan and venturi activate to provide the correct amount of gas and fuel.
The premix burner ignites providing a flame to heat the water.
Cold water is pre heated in the secondary heat exchanger.
Pre heated water passes from the secondary to the primary heat exchanger.
The unit determines outgoing set temperature and adjusts the flame to heat the water.
Heated water moves to the buffer tank.
Desired hot water amount delivered to the faucet.

Navien How Tankless Works

Installation Videos

NCB Heat Exchanger Replacement

NHB Heat Exchanger Replacement

NPE Quick Guide

Premium Gas Tankless Water Heaters

NPE – A and NPE – S

Enjoy hot water on demand with the Navien tankless hot water heater
Save money on hot water operation costs
Half the conventional installation time
Fewer callbacks, longer life, faster heating
TSSA Gas Code Standard: 3/4″ Gas Pipe – no extra gas supply!
Field Convertible Gas System
Dual Stainless Steel Heat Exchangers
2″ PVC Venting up to 60′ – fits through existing vents
3″ PVC Venting up to 150′
Cascading Capable
Energy Star – highest rated gas water heater

NPE – Advanced (NPE – A Series)

Features

0.97 EF advanced high-efficiency
Exclusive ComfortFlow technology
Eliminates “cold water sandwiches” & minimal flow rate issues

Applications

Residential or commercial applications
Where continuous hot water is critical
Where recirculating pump is needed
Longer runs to hot water fixtures
Stand alone or cascade with other NPE units

NPE – Standard (NPE – S Series)

Features

0.97 EF advanced high-efficiency
Durable stainless steel heat exchangers
Convenient 1.2″ gas connections & 2″ PVC venting

Applications

Residential or commercial applications
Buffer tank & internal recirculation pump are not required
Ideal for cascading with other NPE units

Condensing Combi Boilers

NFC

The first high efficiency tankless condensing combination boiler with the capacity to supply both heat &
domestic hot water (“DHW”) for larger homes
Residential
Air handler
Hydronic heating
Hydronic fan coil
Baseboard radiator
Radiant floor
Provide heat to the whole house, and run two showers and dishwashers at the same time!
Half the conventional installation time
Fewer callbacks, longer life, faster heating

Boilers

NFB and NHB

Takes 80% less space than traditional floor standing boiler & tank water heater.
TSSA Gas Code Standard: 3/4″ Gas Pipe – no need to install extra gas supply!
Operates at minimum gas pressure of 3.5 inches of water column, allowing for easy conversion from natural gas to LP
1″ Pressure Relief Valve Included
Turn down ratio of 6:1 for heating and 11:1 for DHW
Ultra Condensing Efficiency
Field Convertible Gas System
Dual Stainless Steel Heat Exchangers, creating the highest flow rate of any combi-boiler in the industry (4.5 GPM@77° temperature rise for DHW)
SS DHW Plate Heat Exchanger
2″ PVC Venting up to 60′ – fits through existing vents, no need for new drilling holes!
3″ PVC Venting up to 150′
Integrated Remote Control
Can be cascaded with NPE unit for large hot water flow demand
Residential Warranty (NPE): 10-yr. heat exchanger limited warranty, 5-yr. parts limited warranty, 1-yr. labour limited warranty. For more information click here.

NHB Series – Condensing Gas Boilers

Much more efficient and longer lasting than old fashioned boilers
95% AFUE recognized as Energy Star Most Efficient rating
Energy Star certified
Takes 80% less space than floor standing boilers
Easy to use
Industry leading TDR, up to 15:1
Dual stainless steel heat exchangers
SCH 40 2” PVC venting up to 60’
SCH 40 3” PVC venting up to 150′
½ Gas Pipe capable up to 40’
Field convertible gas system NG/LP
Cascading capable
Outdoor air sensor

NFC Series – Condensing Fire Tube Combi-Boiler

The ultimate space heating and DHW comfort package
Domestic hot water, finned tube baseboards, cast iron baseboards, radiant floor heating, fan coils, radiators, air handlers
Space heating up to 199k BTU/H
DHW up to 199k BTU/H
DHW module with mixing and water adjustment valves
Multiple venting options up to 150’
Common venting up to 8 units and cascading up to 16 units
AFUE 95% and 11:1 Turndown Ratio
Energy Star certified
Space savings design
Can be cascaded with Navien NPE water heater
Easy to use, elegant and clean appearance