Tankless Water Heater Size report

There are two types of tankless water heaters, gas water heaters, and electric water heaters. Generally speaking, gas water heaters are more efficient and heat water faster than electric water heaters. However, gas water heaters cost more to install and plumb. Electric water heaters are easier to install but cannot warm large amounts of water at once.

Tank water heaters hold water 24 hours a day, even when working or sleeping. However, tankless water heaters do not store hot water. It only heats the water instantly when you use it, and the time it takes to get hot water is directly related to the distance the hot water travels from the heater to where it is used. When you turn off the hot water, the burner or element turns off.

There is no doubt that a tankless water heater's energy savings save you dollars and reduce the environmental impact. Plus, since a tankless water heater heats water while you are using it, you can have an unlimited hot water supply as long as you choose the right size. The following post shares more details about the available tankless water heater sizes.

Tankless Water Heater Size Guide

Tankless heaters are compact home appliances and work by using built-in coils to heat water when you need it, meaning you will always have hot water on demand. Since the unit only heats water as you use it, a tankless heater is usually more energy-efficient than traditional storage-tank water. However, the shortage of a tankless unit can provide only a limited hot water flow rate. Most tankless units can provide up to 3-5 gallons of heated water per minute. These units are a good choice for anyone whose demand doesn't typically call for hot water from more than two places at a time.

The Right Tankless water heater size You need

Tankless water heaters are rated by the gallons per minute they provide, and the average life span is 20 to 25 years. Consider the amount of hot water your household is likely to use when selecting the GPM of a tankless water heater.

calculate peak hot water usage

List the number of hot water devices you expect to use at any one time. Then, add up their flow rates (gallons per minute). It is the desired flow rate for the demand water heater.

Determine installation space

Tankless water heaters are much smaller than storage heaters to be wall-mounted. Electric units have a measurement range of 10 inches high to 7 inches wide, while gas units have 30 inches tall and 20 inches wide. But gas water heaters must have enough space to discharge the smoke from combustion. If there isn't enough space, your only option will be an electric water heater.

Flow heating basics

Most gas water heaters will raise the temperature by 70 degrees Fahrenheit or more when using 5 gallons of water per minute. Most tankless electric water heaters also cause a similar 70-degree temperature rise, but this happens when using up to 1.5 to 2gpm of water. The less water used at any given moment, the higher the water temperature that can be obtained.