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Professionals Questions
Articles and references for professional Noritz tankless installers and servicers
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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... -
How to Sign up for Noritz Training
Noritz University lets our contractors and installers learn more about Noritz products and get more technical. Choose between self-paced courses, webinars, and... -
Download CAD or BIM files for your Project
Looking to spec a Noritz tankless water heater in your next project? You can download CAD and BIM files from... -
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... -
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 Noritz Tankless Water Heaters be used as pool heaters?
A Noritz water heater cannot be used as a pool heater due to the chemicals that can be harmful to... -
Can I use PEX piping for my domestic hot water service?
Generally speaking yes you can however please refer to your local codes. -
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 backup supply recommended with your units?
Battery backups are not a required item when installing or using a tankless water heater, however they can be a... -
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 is the minimum ground clearance for an OD unit?
At least one foot of clearance is recommended for servicing purposes. ClearanceA set distance required for proper and safe operation... -
What is the vent termination clearance from a soffit, deck, veranda, porch, balcony, inside corner, or outside corner of home?
Clearances vary. Please check installation Manual for the correct clearance for your installation. -
Why are the side clearances larger for the new stainless steel models?
On the new stainless steel models, the rating plates are located on the side of the heater instead of the... -
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... -
What are the clearances to combustible and non-combustible material from the heater?
Please refer to the installation manual for your unit to find the appropriate clearances. -
What are the clearances to combustibles when using N-Vent?
Clearances will vary, please download the installation manual for your unit at https://support.noritz.com/technical-literature for the most accurate and up to... -
Hot Water Supply Capacity
Hot water supply performance can be found on the specifications sheet for each heater located on our support site as... -
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. -
Does a Noritz Tankless have a pilot light?
All Noritz Tankless units feature an electronic ignition and thus do not have a pilot light like a traditional tank... -
Does Noritz offer a recirculation pump?
Yes! Noritz offers the RPK-EXT External Pump Kit which may be added to most recent Noritz Tankless units. Additionally we... -
After Hours Will Call Pick Up
Noritz now offers after hours will call pick up option for our valued contractors. We know its not always easy... -
Clean or Change the NRC663 (EZTR40) Fan
Fan maintenance for NRC663 (EZTR40) -
Clean or Change the Fan for a Pre-Mix Unit
Video for maintenance on a Pre-Mix Noritz Tankless -
Changing Remote between F and C
Residential Remotes RC-7651M, RC-7651M-A and the Commercial Remote RC-9018M feature the ability to display set temperatures in either F (default)... -
Heat Exchanger Replacement Procedure
The following list has downloadable PDFS for reference in replacing a Noritz Tankless heat exchanger. See the list below for... -
SPK-EZ3 Service and Parts Kit
GQ60 Service Kit for NRCR/EZ/CDV series Our Noritz Service Kits provide installers with the parts needed to maintain Noritz Tankless...
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