Hot water comprises between 40% and 50% of a household's energy use, and the vast majority of that is used in showering. Most households spend $300 to $400 a year on hot water for showers.
Did you realise that you can potentially halve your hot water shower use while enjoying a high quality shower experience? See p.7 of the BRANZ Report on Home Energy Use.
The experience of showering is not so much a function of how much hot water is used or even the water pressure, but rather the quality of the shower rose. A high quality shower rose can use minimal water while providing a really good shower.
In May 1994 Consumer Magazine tested a range of showerheads and recommended Negawatt's Interbath Watersaver. EECA estimates savings of around $480 over its lifetime, but this would vary depending on the amount of water used, the energy price and the cost of the water. See the EECA Report.
There's a simple test. Run the shower at normal showering temperature for precisely one minute, collecting the water in a bucket. Now decant the water into 2 litre milk bottles.
7 litres - Efficient (Negawatt's Interbath showerhead)
10 litres - Moderately wasteful
15 litres - Grossly wasteful (not uncommon)
Fitting a Negawatt Interbath showerhead can save you $100 to $200 per annum for a cost of only $36. You will have a high quality shower no matter what the water pressure. The absolute maximum water usage will be 9 litres per minute (in a very high pressure system). Fitting the showerhead is a simple DIY job.
Your showerhead comes in three sections: the showerhead (pictured above), the arm (120mm) that comes out from the wall and the flange that sits around the arm as it exits the wall.
2 Tepuni St Petone
(opposite Smith and Smith glass)
Hours: 8.30am-5.00pm Mon-Fri
Saturdays - 9am -1pm
Phone 04 939 0313
Fax 04 939 3965
PO Box 38-028
Wellington Mail Centre, NZ