Water Heaters and Models

Q: How do Noritz tankless water heaters work?

A: Noritz water heaters work on demand. They only heat water when necessary. When a hot water fixture is opened or hot water is required by an appliance, the heater will sense the demand and heat water accordingly. Instead of wasting energy and money storing hot water when it is not needed, tankless water heaters provide only as much hot water as needed.

Q: What is the difference between a storage tank water heater and a tankless water heater?

A: Tank water heaters store and heat water at all times, thus incurring higher operating costs, whereas tankless water heaters only heat water as needed. In addition, tank heaters have a limited supply of hot water, while tankless heaters provide an unlimited supply of hot water.

Q: How much money can be saved if a Noritz tankless water heater is used in place of a storage tank?

A: The California Energy Commission estimates that a water heater uses approximately 25% of all energy consumed by any household. Using a Noritz tankless water heater will allow a home to use up to 50% less energy for water heating, which can cost up to hundreds of dollars per year.

Q: Which model of Noritz tankless water heaters is right for my application?

A: The best way to size a tankless water heater for any application is to estimate the peak flow capacity that will need to be supplied by the water heater at any time. For residential use, this will most likely be the maximum number of showers that may be used simultaneously, multiplied by the flow rate of the showerheads. This calculation should only be done by a qualified plumber or contractor. Once this maximum flow rate is calculated, consult the specifications for each heater to determine which models meet your demand.

Controlling the Heater

Q: What temperature should the water heater be set at?

A: The set temperature of the water heater depends on how it will be used. A comfortable shower temperature should not be much higher than 100 °F (temperatures above 120 °F will cause burns). Lower temperatures will also prevent scale deposits from forming and affecting the operation of the heater.

Q: How do I change the temperature on the water heater?

A: Every Noritz tankless water heater comes standard with a remote digital temperature controller, which allows you to adjust the water temperature. The controller is optional with the N-063S model. For other models, the control panel can be wired and installed in a remote location. The water temperature is displayed on the control panel, and can be adjusted using the up and down buttons.

Troubleshooting & Maintenance

Q: There isn't enough water pressure from the heater.

A: If the pressure being supplied into the water heater is low, the pressure coming out of the water heater will also be low. If the supply pressure is normal and the water pressure is still low, the water heater may be too small for your application. Contact your authorized installer about replacing your heater with a larger one.

Q: What about hard water or poor PH levels?

A: Hard water is an issue throughout the United States, with some cities more problematic than others. Like most water appliances in your home, damage resulting from hard water may void the warranty. We recommend flushing your water heater every two years or as needed. Alternatively, water softeners or scale control filters will dramatically decrease the affects of hard water not only for your water heater, but also for all appliances and plumbing fixtures.

Q: Water is dripping from the relief valve on the outlet of the heater.

A: This may be a failure of the relief valve, but more likely the result of dangerously high temperatures or pressures in the water heater. Contact Advanced Water Heaters to check this problem.

Q: There is a number flashing on the control panel.

A: When the temperature is set to 140 °F or higher, that temperature will flash on the control panel display for the first ten seconds. If the number continues to flash after ten seconds or if there is no number displayed, contact a plumber for service.

Q: Can Noritz tankless water heaters be used in extremely cold regions?

A: Noritz tankless water heaters have freeze protection that will protect it from below freezing temperatures, but only down to 5 °F. Even if the heater is installed indoors, follow the instructions in the "Owner's Manual and Installation Guide".

Q: Is regular maintenance required?

A: Consult the "Owner's Manual and Installation Guide" for proper maintenance procedures.