I have a relatively new home (2004), with a 55 gallon hot water heater. We recently completed a bathroom remodel, which includes a spa shower and an extra large bath tub. Unfortunately our hot water heater cannot keep up with the increased demand. Is there a way to improve our hot water capacity so we can enjoy the new bathroom features? Are the tankless water heaters effective and worth the investment? Should we move to a larger water heater tank? Is it possible to have a combination of both (tankless+tank)?