Tankless water heaters operate by heating water as it passes through the unit. When a hot water
tap is activated, the system takes in cold water, and a heat exchanger quickly heats the water to
the desired temperature, which is then supplied to the faucet or shower.
Boston Tankless water heaters are supposed to provide hot water instantly. But sometimes, if you
use too much hot water at a time, the heater may be unable to keep up and only produce warm
water. While it's not the perfect solution, it's better than getting cold water like a regular water
heater. To fix this problem, consider spacing out your hot water usage or getting a more
extensive system to handle your needs.