No, not Old Faithful but a high-tech heating device called The Vulcanus Mark 4. Small and sleek enough to fit in a pantry or stand alone, the Vulcanus Mark 4 spews hot water instantly like other on-demand hot water heaters, but it does it without gas. By taming Faraday’s principal(that's microwaves to you and me), Pulsar Advanced Technologies has harnessed the power of electricity in a water heater, without the cumbersome tank and constant energy usage of a standard water heater. It needs no utility room, no ventilation, and doesn't require a pilot light. So save some energy by buying green. Currently available in Canada but touring the U.S. at major home shows.