Slightly different, as this seems to hook in to your existing water pipes for moving the heat out from a central location - but an interesting find. Another I'm

Slightly different, as this seems to hook in to your existing water pipes for moving the heat out from a central location - but an interesting find. Another I'm watching from a distance is microwave-based heating, essentially replacing the gas burner in a combi boiler with a flow-through microwave heater.