Instead of wrapping prehistoric electrical cylinders to save some energy, the whole of NZ should be looking at instantaneous gas heaters for hot water. More than 75% of NZ buildings use electricity for hot water, space heating and cooking… which is very inefficient and makes many households vulnerable because energy prices have risen more than 60% in last 10 years. The cheapest way to produce hot water is the combination of a solar hot water system + gas califont in series. If the SHW is state of the art you will save over 70 % on your energy bill .Unfortunately not many solar systems in NZ are state of the art so be careful before you buy! There is a reason for the scepticism towards solar energy in NZ because of ongoing quality and performance issues!
13
Jul