What is the impact of moving a geyser outside?
Thank you keshlam. Anyway, it may actually cost less throughout the year. Paint it black (or just dark) or put it in a dark shed in a sunny area to greatly assist heating &amp; heat retention. Air temperature is always lower than Solar Gain, a roof can reach 48C (120F) in 21C (70F) air.

If doing a shed, the year-round setup would be to heavily insulate the shed so it retains as much heat as is generated &amp; that radiates in. If no shed, then a heavy insulation sleeve would be beneficial for the winter. Leading to, if you have an attic, it should go there instead.