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Owner Questions
Common questions for current tankless owners
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What is the typical amp draw of a Noritz tankless unit?
Electrical amp draw of Noritz tankless water heater Typical amp draw (current) for all of our units is between 1-3... -
Flow Rate Chart
The chart below will show you the maximum flow rate a unit can provide based on the temperature rise. What... -
What should I do to treat hard water?
Noritz Water Treatment Guidelines There are several technologies used to treat hard water either by changing its chemical nature or... -
Federal Tax Credit Certificate
Non-Business Energy Property Tax Credits Have Been Retroactively Extended Back To January 1, 2019, Through All Of 2020 Good news!... -
How Do I Register my Warranty?
You can learn more about warranty registration here:http://www.noritz.com/home-owners/warranty/ Or download the warranty registration form: http://www.noritz.com/u/warranty_card_tankless_7_09.pdf -
What if there is a power outage?
Will I get hot water if there is a power outage? Tankless heaters will not work if there is a... -
Can a residential heater be installed in a commercial application?
Yes, a residential heater can be installed in a commercial application, however please be advised, the heat exchanger warranty will... -
What does the term “temperature rise” mean?
The difference between the incoming ground water temperature and the set temperature of the tankless unit. For example, if your... -
Can I use PEX piping for my domestic hot water service?
Generally speaking yes you can however please refer to your local codes. -
Why does my water heater turn on momentarily sometimes when no one is using hot water or when someone flushes the toilet?
This could be an issue with the water pressure coming to the heater or a plumbing issue such as cross... -
What is the maximum flow rate allowed through the H2Flow?
Although the H2Flow is capable of serving up to 10 gallons per minute water flow, the ideal maximum flow rate... -
Is the 8-10 gallon storage tank necessary for a recirculation system?
It is not necessary; the 8-10 gallon storage tank alleviates cold water sandwiching effects that occur in some installations. It... -
Is a battery back-up supply recommended with your units?
It is not required, but can be beneficial if you are in an area which incurs frequent power outages. The... -
My heater shuts off while I am in the shower or using the sink in the kitchen, why? There are no error codes on my remote.
This type of problem is typically caused by low water flow. Noritz tankless water heaters have a minimum flow requirement... -
What constitutes a qualified installer?
A qualified installer requirement will vary according to their respective states, county or city. Make sure the installer you choose... -
Can I install my heater in a closet/cabinet?
They can be installed in a mechanical closet as long as there is a sufficient supply of air. To ensure... -
How do I raise the temperature above 120F?
By default Noritz Residential units will lockout temperatures above 120F. Temperatures above that are scalding and could cause harm or... -
What accessories are available for my Noritz tankless heater ?
Please see below (from 2021 product catalog) or download the product catalog HERE A qualified Noritz installer near you can... -
How to Install an External Remote
To locate the directions for your specific model, please consult your installation manual. How to Install Remotes (Most Units) Considerations... -
How much money can I save with a tankless (compared to a storage tank)?
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What is the warranty on Noritz heaters?
Please see the following page for warranty information: http://www.noritz.com/about-noritz/warranty/ -
Not sure what model you have?
How to locate model and serial number. What model do I have? Applicable Models Models: ALL MODELS
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