Does anyone in your family like to take long hot showers?  Usually, the answer is yes.  Chances are your family never has enough hot water.  I welcome any questions you may have about my personal experience with tankless water heaters.  I will say that my wife believes our tankless water heater is the best bang for the buck home improvement we've purchased.  If you have questions about brands, sizes, or functionality, please ask.  You will never run out of hot water again.  I own the Takagi brand.