 So this question's from Carrie. What makes a tankless water heater more efficient than traditional tank systems? This is a really great question. If you have a regular water heater, when you turn on your hot water tap, it draws water that has already been heated in your tank. Tankless water heaters supply water on demand, so no more fighting over who gets to shower first in the morning. That's a big deal. You get a continuous supply of hot water and everyone can shower. It's great. With a tankless water heater, you also avoid heat loss and save money on your energy bills. Why? Because the water is not sitting in the tank when the water heater is not in use. According to the U.S. Department of Energy, tankless water heaters are 24 to 34% more energy efficient on average for a typical home with two showers a day, a dishwasher and a bathroom for a two-person household. Pretty great.