Can the heaters be painted?
Although not recommended, heaters can be painted as long as safety labels and vents are not covered. Applicable Models Models:...
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General Questions
Common questions regarding Noritz or company resources
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What is a condensing heater?
A condensing heater passes hot flue gases through a secondary, stainless steel heat exchanger1 to preheat the inlet water temperature.... -
Can I purchase a unit directly through Noritz?
Where to buy? Noritz sells through professional distribution only, not directly to end users. End users should contact a professional... -
Is it okay to use reverse osmosis (RO) water with Noritz tankless water heaters?
Reverse osmosis water cannot be used with Noritz tankless water heaters. RO water will eat away at minerals in the... -
Can I use 1/2″ water line for a tankless water heater installation?
The water connections on all Noritz tankless water heaters are 3/4″ with the exception of the NC380, which is 1″.... -
Can I install my heater in a manufactured or mobile home?
All single vent (SV) units and converted DV units (utilizing SV-CK3) are not allowed in mobile home installations. For direct... -
Why should I buy from Noritz and not Rinnai, Takagi, Bosch, Etc?
Noritz is the #1 manufacturer of tankless water heaters worldwide and has been in the industry for over 50 years.... -
Does Noritz sell any tank style water heaters?
Noritz America does not make any “tank” style water heaters. All our water heater are tankless water heaters. -
Why won’t the heater turn on?
If the heater is not turning on, but there is a display on the remote, the filter might be clogged.... -
How much electricity do Noritz tankless heaters need?
120v AC, 220v AC, DC??? The electrical requirement of our tankless heaters are typically 120 volts AC by 5 amps... -
Why does my heater keep making noise, even when there is no water running?
The heater has control valves that will make a “beeping” sound. This can be triggered during normal operation or as... -
Not sure what model you have?
How to locate model and serial number. What model do I have? Applicable Models Models: ALL MODELS -
My unit is rumbling when it’s trying to fire.
Why does my unit make noises? This can be a result of a blockage in the flue, incorrect vent sizing,... -
Can I use Noritz heaters for heating and domestic hot water?
Yes, you can use a Noritz tankless water heater for domestic hot water in conjunction with a heating system but... -
I recently had my tankless unit installed, why don’t I get hot water at all my fixtures?
Tankless water heaters require a minimum flow rate to be met before they activate and provide hot water. Most units... -
Can I install my heater in the attic or crawl space?
One of the many benefits of going tankless is the relatively small size of the unit and it can be... -
Can I adjust the temperature on a heater without a remote?
Our tankless heaters have a factory default setting of 120°F. The method of adjusting the temperature without a remote varies... -
What should I do if I see water dripping from the bottom of my unit?
Water dripping from the bottom of a heater typically indicates an internal leak or rain water entering through the exhaust... -
Why does it take so long for the hot water to get to the fixture?
A tankless water heater produces hot water almost instantly at the heater, but it may take a while to travel... -
Is there an issue with installing Noritz tankless water heaters on “off the grid” or solar power sources?
A common issue with “off the grid” installations is the voltage signal that feeds the tankless water heater. Noritz water... -
What is the difference between ASME and non-ASME heaters?
Commercial ASME1 heaters are tested after manufacturing to comply with ASME1 quality control standards. These ASME1 heaters also carry a... -
Why do I get very little pressure at my fixtures when I turn on the hot water?
Low hot water pressure issues can stem from the source of hot water or localized at the faucet. If certain... -
Will I need to increase my gas line size?
Whether or not you need to increase your gas line size will depend on a few factors. In most cases... -
What does the flow meter alarm set button do? What does 990 mean?
Flow Meter Alarm Button The flow meter alarm1 set button lets you set an alarm for a volume of water... -
What do I use to run the drip line for the condensation T?
Consult with local codes. 3/8″ (1/2″ on DVC) high temperature silicon rubber tubing is recommended. -
Upgraded Isolation Valves (2021)
Upgraded for 2021, our Noritz isolation valves have been given a new ergonomic design for easier use. The hot and... -
Noritz Will Call Instructions
How to pick up a part at our Will Call at our California or Georgia locations California Location Address: 11160... -
Download Technical Documents & Manuals
Are you looking for PDF documents of technical documents or manuals? You can search our database via model number and... -
What’s Your Heater Price/Cost?
Noritz is a business to business manufacturer and we distribute our heaters through our network of distributing partners. This means... -
What is Title 24?
Title 24 is a California Energy Commission mandate that adopts and implements energy efficiency standards for both residential and nonresidential...
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