My son has sent me this. Apparently a friend of his has invented this unit whereby heat is created in the condenser and transferred into the geyser.
My question is twofold.
Is this just a cheap heat exchanger and if so does it really produce hot water cheaper than the geyser can?
The following is a promotional video for the device.

https://cloud.tapatalk.com/s/6239d964...322-WA0011.mp4

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