The stand-alone storage heater is the most common water heaterin use today. It is typically powered by natural gas, liquidpropane, or electricity, depending upon which of these energies isavailable and most economical. There is something nice to be saidfor 35 or 50 gallons of hot water being always at the ready forshowers, baths, laundry, or dish washing. The downside of theseheaters is exactly that which is so nice about them: 35 to 50gallons of water which is always kept hot whether it will be usedor not. In warm climates or ho weather, hot water usage can dropquite low. It seems counter-intuitive to be cooling the entirehouse while simultaneously heating water in the water heater.The tankless or on-demand style of water heater offers a viableoption to the storage water heater. This type