How is the selection made?

The following information is required to select a Demand Duo system:

The following information is required to select a Demand Duo system:
Volume of hot water used per event (i.e. people having a shower)
Number of times this event occurs (i.e. 6 uses of each shower head per hour)
Internal or external installation (i.e. whether a flue system is required)

First Hour Delivery = Tank volume + 760 litres per HD200.
First Hour Calculations Apartments: 1 bedroom 45 litres, 2 bedroom 75 litres, 3 bedroom 105 litres.
Amenities: 6 x 27 litres hot water per shower per hour.
Hotel: 1-3 star 22 litres, 4-5 star 35 litres. Allows for showers, meals and laundry.