Electric instantaneous water heaters
Usage Which water points would you like to use (Tap, Shower, Bath)?
/ Based on the preferred water point the average temperature and water flow will differ. / Refer to the table below to understand the average flow rate for each water point:
WATER POINT
AVERAGE WATER FLOW
TAP
2-4 l/min
SHOWER
5-7 l/min
BATH
12-14 l/min
24
17,2
This is an estimation and it varies according to the geographical location.
2 Identify the right power needed
Which power (kW) is right for you?
There are two external factors which impact the power supply: / Inlet Temperature : what is your average ground water temperature? / Water Flow : how much water do you use at your peak time?
Example : the power needed for a simulated flow rate data for ∆Temperature (°C) = 20°C, calculated using the formula Power = Flow Rate x ∆Temperature x 0,07
POWER [kW]
∆TEMPERATURE [°C]
FLOW RATE [l/min]
4,9
20
3,5
9
20
6,5
12
20
8,6
24
20
17,2
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