According to Energy.gov, “For homes that use 41 gallons or less of hot water daily, demand (or tankless) water heaters can be 24% to 34% more energy efficient than conventional storage tank water heaters.” Tankless water heaters (if gas-fired) will save homeowners over $100 annually the longer they remain in service.
Let’s first think about how we typically store hot water in our homes or business. We use large 40-60 gallon tanks in our basements preheating water having it ready to use when we turn on a tap. Sounds good right? Well this is a huge waist of energy. No matter what you do during the day, that water tank is going to maintain the temperature of the water inside using energy. Every time the tank is used, cold water is dumped back into the tank causing the heating cycle to engage again. If the tank is drained. a lot of time and energy is used to reheat the entire tank and no hot water will be available to use during this time.
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