DOMESTIC HOT WATER

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

COMBI-BOILERS

Navien condensing combi-boilers supply both heat and domestic hot water.

  • AFUE 95% Energy Star Most Efficient for 2019
  • Energy Star certified
  • Backed by the industry’s strongest warranty—10 years on heat exchangers
  • Takes less space than floor standing boiler and tank water heater
  • Can be cascaded with Navien NPE water heater for increased DHW flow demand
  • Easy to use control panel
  • Elegant, clean appearance
  • Ideal for replacements or new construction
  • Optional NaviLink™ WiFi remote control system
  • NaviClean™ magnetic filtration system (Included NFC / Optional NCB-E)

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