Frequently Asked Questions about Continuous Flow Hot Water

Continuous flow hot water is an alternative water heater to storage tanks. Rather than storing water in a tank and heating it in anticipation of use, continuous flow only heats water as you need it.
They use a small wall-mounted unit to heat water when the hot water tap is turned on. These hot water systems come in gas and electric variations and can be a lot more efficient than storage tanks.

While with storage tanks you need to select a tank size that is suitable to your home’s water usage, this question does not apply to continuous flow hot water. Rather, the flow rate is required!
Flow rate is a measure of how much hot water a continuous flow water heater can produce per minute. A licensed plumber can help you to select an appropriate flow rate for your home’s needs.

Continuous flow hot water systems are especially good for small to medium homes. Rather than heating water that you won’t necessarily use, or losing heat as it just sits there in the tank, these systems only heat the water you need.
This makes continuous flow hot water more energy efficient and more cost effective.
Larger homes who use a lot of hot water might not find a continuous flow hot water system with a flow rate that can meet their needs, however. In addition, there is a delay between turning the hot water tap on and hot water being provided. This is the time it takes for the cold water to be heated by the system.