Purly heating by energy is the worst case scenario. I have to believe your 'the zeb' system has to be a scam as the energy amount such a small device can store

Purly heating by energy is the worst case scenario. I have to believe your 'the zeb' system has to be a scam as the energy amount such a small device can store, doesn't add up at all. If it requires a big water heating tank, than this device should be as big as a computer + a heating coil. Whatever they do with there 'energy core' its either magic and patented or just a scam.