Will one tankless water heater work for the whole-house?

Whether a tankless water heater is point-of-use, as in the illustration above, or a whole-house unit, they work the same basic way. The volume of water the unit is required to heat, measured as the flow rate in gallons per minute (GPM). The temperature of the cold water entering the unit.

Is there such a thing as a tankless water heater?

Either a gas burner or an electric element heats the water. As a result, tankless water heaters deliver a constant supply of hot water. You don’t need to wait for a storage tank to fill up with enough hot water. However, a tankless water heater’s output limits the flow rate.

How big of a vent do you need for tankless water heater?

In some cases, however, larger gas lines will have to be installed to meet the water heater’s demand. The venting needs of a tankless system also affect its placement. If the system will be vented through the wall, the vent must be at least 3 feet from any operable window.

What’s the distance between a tankless water heater and hot water pipe?

Keep a distance of 24″ between the combustibles, the water heater, and the output hot water pipe. Again, remember to be a law-abiding citizen. Install your tankless water heater according to your State or City’s local codes. If they’re none, at least follow the recent edition of the National Fuel Gas Code.

Which is more energy efficient, tankless or demand water heater?

Advantages and Disadvantages For homes that use 41 gallons or less of hot water daily, demand water heaters can be 24%–34% more energy efficient than conventional storage tank water heaters. They can be 8%–14% more energy efficient for homes that use a lot of hot water — around 86 gallons per day.

Can a tankless water heater be used to heat the House?

The output in Btu of a heater large enough to supply a home’s domestic hot-water needs is typically sufficient to meet its heating needs as well. If the heating circulators happen to be running at the same time as the domestic hot water, the temperature in the heating loops may drop slightly.

What makes a tankless water heater break down?

Additionally, hard water (water containing high levels of minerals) can cause tankless water heaters to work harder and eventually break down. Due to this risk, some manufacturers require that you also install a water softening system, or the warranty is voided.

Is there a gap between hot and cold water in a tankless water heater?

Since tankless water heaters need a minimum amount of water flow before activating, there’s a gap between completely cold water and the coolest warm water that you can create with a hot and cold water mix.

In some cases, however, larger gas lines will have to be installed to meet the water heater’s demand. The venting needs of a tankless system also affect its placement. If the system will be vented through the wall, the vent must be at least 3 feet from any operable window.