Introducing the Navien NCB Combi Boiler

Energy Efficiency with Hi-Tech Comfort!

  • Air handler
  • Radiant floor
  • Baseboard radiator
  • Hydronic fan coil
  • Hydronic heating

    Space Saving Design

    Occupies 80% less space than a traditional floor standing boiler and tank water heater.


    Space Savings Design

    Occupies 80% less space than a traditional floor standing boiler and tank water heater.


    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.


    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.



    For extraordinarily large domestic hot water flow demand, the NCB can be cascaded with an NPE unit.


    Circulation and buffer tank

    Navien Combi boiler is appliances in one. It provides sufficient heat for your hydronic radiator system and your hot water for your taps and showers, without sacrificing quality.


    Comfort Flow Technology

    Flow technology is an advanced system designed to provide the most comfortable and seamless delivery of hot water on the market. The two key components on all “A” model condensing tankless water heaters are, internal insulated buffer tank and a recirculation pump. Since Navien is the only tankless manufacturer to provide you with these premium features you never have to worry about the “cold water sandwich” phenomenon that affects many other tankless water heaters.


    Our Qualifications

    Factory Trained

    Prefabricated at shop

    Specialized Tools

    Continuous Mentorship

    Recognized Top 5 Navien Dealers

    Heater Boiler Replacement

    Accuserv replaced my propane boiler and hot water tank with a combination boiler/tankless natural gas system. The project was done professionally and carefully. I am very happy with the end result! Aaron and Jared were courteous, knowledgeable and professional, paying attention to all the details. I would recommend Accuserv for anyone who needs a furnace and/or hot water system replacement. I also enrolled in the monthly service plan as I feel confident my new system is in the right hands for years to come. Thanks Aaron! Jan 23, 2015, Toronto

    Heater Boiler Replacement

    Old heater/boiler failed due to usual builders’ shotty corner cutting practices. With a 3 week old newborn this couldnt be a worse timing! Long story short, Aaron, James and Josh were able to push their appointments and accommodate to my urgent needs. 2 days later I now have a new efficient and functional heater/boiler unit! Couldn’t appreciate more for the prompt turnaround and friendly customer service guys!
    Jan 23, 2015, Toronto
    AccuServ Heating and Air Conditioning