Nice, if this can do on demand water heating to 70C then this is what I've been looking for. Instant/Continuous flow water heaters are great because they only

Nice, if this can do on demand water heating to 70C then this is what I've been looking for. Instant/Continuous flow water heaters are great because they only heat up what you need when you need it. So far the only ones I've found that are suitable for running a home hot water system are gas based. If you want electric, which I do because I have to get gas bottles delivered, then you're either stuck with low-pressure single-tap systems or a tank system that is either heated traditionally or by heat-pump. A heat-pump beefy enough to do continuous flow would be awesome (though I guess potentially very expensive)