- The Basics. learn more »
- Energy Savings. learn more »
- Tankless Water Heater Location. learn more »
- Outdoor Installation. learn more »
- Performance.
- Serviceability. learn more »
- Choosing The Right Size. learn more »
- Warranties. learn more »
Performance of Tankless Water Heaters
Another reason that builders like tankless water heaters is that they are able to provide hot water to today's popular large tubs. A standard bathtub holds about 35 gallons to the overflow. The popular soaking tubs holds anywhere from 45 gallons to over 80 and just filing up the tub leaves most without any hot water with a tank type water heater for a period of time.
Until now, most people made "water rules" to determine who showers when, or when they could do the clothes or dishes. This goes with a tankless water heater.
A tankless water heater can fill all the tubs of a home and then provide back to back showers, do the dishes, and wash the clothes. A tank type water heater has to be very large to do all of these things without running out of hot water. We are only limited to the flow rate our tankless water heater unit can provide.
Choosing a tankless water heater with the proper capacity for our house makes it possible to handle multiple hot water needs at once normally, without the worry of running out of hot water.
Until now, most people made "water rules" to determine who showers when, or when they could do the clothes or dishes. This goes with a tankless water heater.
Some people mistakenly think they will only be able to run one fixture at a time with tankless heater. While this may be true of the "Home Center" models, this is far from accurate when speaking about the professional grade heaters from Noritz, Rennai and Takagi.
These models have the capacity to operate 3 showers or more at the same time! Some will correctly claim that tankless water heaters limit the flow rate to make sure you get the setpoint temperature and say that this means you will not be able to do multiple things within the home using hot water. This is simply not true. Choosing the right unit is important and will be discussed a little later, but making this claim is like comparing all tank water heaters to the old 30-gallon tank heater that would run out after every use.
Today's tankless water heaters provide more than enough capacity to meet any hot water need from a one-bedroom house to a hotel. You just need to choose the correct system for your application just like any other hot water system.
Many tankless water heaters are also installed with a remote control unit that makes it easy to change the set point temperature of the unit. One manufacturer, Noritz, has a standard remote that lets you set an alarm to the capacity of your tub.
Another manufacturer, Rennai, is able to provide multiple remotes to serve the same heater to provide for multiple locations to change the temperature of the hot water if you like. (You still only get one water temperature at a time, you just have more locations from which to choose the temperature). These digital remote control panels also provide diagnostics for the water heater in the event that there is a problem. They flash a fault code to help service personnel find and fix any problems that may come up quickly.