The Demand Duo Lite is comprised of an electric tank and gas boost continuous flow water heater. Ideal for applications requiring a large, intermittent demand for hot water. For example, spa baths, large homes with multiple showers being used simultaneously, small hair salons or small launderettes. External installations only.
Benefits at a glance
The high input, fast heating system ensures the storage tank refills and reheats fast.
Heavy duty insulation minimises heat loss to keep energy costs under control.
Status monitor makes it easy to check on the operation of your water heater.
System is centralised which helps to reduce the total cost of installation.
How it works
The thermostat senses the temperature of the water in the tank, and when it drops below the set temperature, the primary pump is activated. This in turn starts the Rinnai continuous flow water heater which returns heater water to the tank.
180 L or 240 L
160 MJ/h or 44 kW
Gas supply, cold water inlet, and hot water outlet—all 20 mm
Grundfos UPS 20-60 B 150
180 L, approx. 36 minutes
240 L, approx. 67 mins
Glass lined inner, corrosion resistant outer and high density expanded polyurethane foam insulation
Preset to 65 ºC
180 L - 1000 kPa
340 L - 850 kPa
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What’s the best way to heat your water? Gas or electricity? Continuous flow or a storage cylinder? Low pressure or mains pressure? All your questions are answered here.