Noritz introduces the No Roof Kit to maximize the ease and efficiency of tankless venting by removing the need for roof access

Designed to simplify and expedite tankless water heater installation in residential applications, the new kit boosts time-, labor- and cost-savings.

FOUNTAIN VALLEY, CALIFORNIA (AUGUST 15, 2023) – Noritz America, a leading innovator in tankless water heaters, maximizes the ease of installation with its new No Roof Kit, an industry-first in the tankless arena. With this accessory, premix burner Noritz tankless water heaters can be installed without the installer setting foot on the roof, offering time-, labor-, and cost-savings in residential applications.

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Not only does the No Roof Kit eliminate the contractor’s need to climb on the roof to install venting for the tankless water heater, but drilling holes in the wall for exhaust is also no longer needed. Best suited for single-story homes and attic installs, the No Roof Kit is sold separately from the Noritz model of choice and includes all the necessary components for installation.

Those components include three, 36-inch polypropylene (PP) pipes and a PP-PVC adaptor, a 2-inch single vent (SV) conversion kit, and a diffuser kit. To use the kit, a pre-existing, 3- or 4-inch circular B-vent, no longer than 8.5 feet, with a straight vertical shot from the ceiling to the roof, is required.

Installation of the No Roof Kit involves the following:

  • The installer connects the diffuser to the top of the first PP pipe, securing it with a ceiling clamp.
  • A spacer is then added to ensure proper height between the pipe and the rain cap, allowing sufficient airflow for the exhaust of the water heater.
  • The first pipe is then attached to a secondary PP pipe, using aluminum tape, and then pushed into the existing circular B-vent.
  • The third pipe is secured, using aluminum tape, and a base junction adaptor is installed at the end of that pipe.
  • The PP-PVC adaptor is then secured to the base junction adaptor.
  • Finally, the tankless water heater unit is mounted, and the PP-PVC adaptor is attached using PVC elbows and straight pipe (PVC parts are field supplied)

The redesigned 2-inch SV conversion kit carries a sleeker look, allowing air to enter the unit to be used for combustion, while permitting the exhaust to move through the No Roof Kit, using the B-vent as a chase.

The No Roof Kit, at half the price of the current flex kit, can be used with the Noritz EZ98 and EZ111, as well as the Noritz NRCR Residential Condensing Tankless Water Heater Series.

To learn more about the No Roof Kit, contact a Noritz product expert HERE.

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For more information on the full line of Noritz tankless water heating products, visit You can also telephone us at 866.766.7489 or e-mail us at [email protected].

For editorial assistance, contact John O’Reilly at GreenHouse Digital PR, 15255 South 94th Avenue, Suite 500 | Orland Park, IL 60462; tel.: 708.428.6385; e-mail: [email protected].

NORITZ AMERICA CORPORATION, a subsidiary of Noritz Japan, has corporate offices in Fountain Valley, Calif., and Atlanta, offering a full line of tankless water heaters and high-efficiency combination boilers to meet the hot water demands of residential and commercial applications. Noritz supports its products with a national network of skilled representatives and employees who are committed to providing the finest products and services to our communities by helping consumers live a more comfortable, efficient, and healthy lifestyle. For more information on Noritz America and the entire line of Noritz’s ENERGY STAR® tankless water heaters, please call (877) 986-6748 or visit our website at


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Noritz No Roof Kit

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