Energy Savings

The tables below illustrate the kind of energy savings you can expect from using the instant hot water unit DDLT with a 3 phase 400V supply.

Annual Energy Consumption in kWh

System

Household Size

1 Person

2 Person

3 Person

4 Person

Geyser

1100

1850

2450

3050

IWH

750

1500

2100

2700

% Saving with IWH

32%

19%

14%

11%

According to Table 1 IWH are most effective in a small households consisting of only one person.

Hydraulic IWH and Geyser Loads in kWh

Time

Activity

Hydraulic IWH

Geyser

Morning

Shower: 2x40 litre
Basin: 5 litre

3.04 kWh

3.54 kWh

Evening

Kitchen: 6 litre
Shower: 35 litre

2.05 kWh

3.21 kWh

Standing loss

Geyser

Pipes

0

0

1.154 kWh

0.086 kWh

 

TOTAL LOAD

5.09 kWh

7.99 kWh

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