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Shower - Geyser Control

Warm water generation is one of the essential attributes of a developing society. Solar Water Heating systems (SWH) are far superior in the mitigating of energy consumption in the process of generating warm water. The downside of the SWH approach is the initial cost layout involved. This prohibits a lot of people to actively engage in the process of saving energy on the primary energy consumer in the household, namely the geyser.

The diagram above displays the Winter Load Profile of Middle-Income homes (Holm et al, 1999), showing the prominent effect of the electric geyser.

However, SWH’s aren’t the only solution to mitigating the electricity consumption of an electrical geyser. Two efficient applications can be installed for a relative low capital outlay that can have a drastic impact on the prominent effect of an electric geyser.

These two are:

  • A geyser controller and
  • Water saving showerhead(s)

A one shower head and geyser controller combination will reach a positive saving return on investment within 15 months. This is in a situation where the shower is used twice a day. The focus is to avoid unnecessary geyser peaks and to make use of as little as possible hot water while showering.

For a relative small investment each house can immediately start saving on the cost of utilities but also has a dramatic lowering impact on their CO2 footprint. With a small capital investment and change like this, the Eskom suggested 10% electricity target saving of a household is already met and passed a few times over.