The first high efficiency tankless
condensing combi‑boiler that can do it all
Space saving design occupies 80% less space than a traditional floor standing boiler and tank water heater.
NCB-E: the inside story
For fast installation and maximum efficiency, install our system matched manifold kits
Compare these advantages to any tankless condensing combi system
Dual inputs of up to 120k BTU/h for heating and 199k BTU/h for DHW
Supplies all the heat and domestic hot water that most houses require.
Low exhaust gas temperatures allows use of PVC, CPVC, ULC S636 and polypropylene vent systems, reducing installation time and costs. System can use 2″ venting for up to 60′, or up to 150′ with 3″ venting.
4.5 GPM@77° temperature rise for domestic hot water
Separate stainless steel flat plate heat exchanger for DHW creates the highest flow rate for any combi‑boiler in the industry.
Uses existing ½” gas piping
Save time and effort in retrofit applications with ½” gas lines for up to 24′.
Turn down ratio of 6:1 for heating and 11:1 for DHW
The sophisticated gas flow control system provides a high turn down ratio, reducing energy waste and excessive boiler cycling and enhances temperature control for DHW.
Low gas pressure operation
Operates at minimum gas pressure of 3.5 inches of water column. Allows for easy conversion from natural gas to LP.
Dual stainless steel heat exchangers
Stainless steel heat exchangers for hydronic heating are warranted for 10 years. They resist corrosion longer than copper or aluminum heat exchangers.
Space saving design
Occupies 80% less space than a traditional floor standing boiler and tank water heater.
Field gas convertibility
Dual venturi system allows for easy field convertibility from NG to LP operation. Orifice for LP conversion included.
For extraordinarily large domestic hot water flow demand, the NCB-E can be cascaded with an NPE unit.