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We have an indoor geyser but are considering moving this outdoor to save space. We live in a Mediterranean climate with a cold winter day being 5°C (41°F) and summer temperatures generally ranging from 20-25°C (68-77°F). I imagine that the inside temperature is about 5°C (9°F) higher inside than outside during a winter day. In summer things are pretty much the same inside vs outside.

Our geyser is the number one electricity consumer in our household. I am wondering, if we move it outside, how would it affect electricity consumption? Any idea how much it would increase?

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    I presume you're in the UK? (For those in the US, a geyser is a water heater.) – keshlam Mar 9 '16 at 7:13
  • How low might the temperature drop in the middle of an unusually cold winter night. You probably don't want it to freeze up and burst every other year. There may be local laws about the location of these sort of devices. – RedGrittyBrick Mar 9 '16 at 9:47
  • I bet your geyser (never heard that before...) is designed either as indoor-only or able to be placed outdoors. Perhaps if you supplied make and model we could figure out which it is. – Daniel Griscom Mar 9 '16 at 10:53
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    @keshlam I was wondering about getting the ceiling wet every 60-90 minutes. – Wayfaring Stranger Mar 9 '16 at 15:54
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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 & 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 & 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.

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