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Navien NPN Water Heater
15 Year Limited Warranty
This 15 year limited warranty on heat exchangers, 5 year limited warranty on parts, and 1 year limited-labor warranty ("Warranty") covers defects in materials or workmanship when the Navien NPN Water Heater ("Product") is installed by a properly licensed plumber or contractor and operated in strict compliance with the Installation & Operations manual procedures, subject to the terms within this Warranty document. Improper installation or use will void this Warranty. This Warranty runs from date of installation and extends to the original purchaser and subsequent owners, but only while the Product remains at the site of the original installation.
What is Covered?
Subject to the foregoing terms, Navien will repair or replace the covered Product or any part or component that is defective in materials or workmanship for a period of five (5) years in regard to parts and up to fifteen (15) Years in regard to the heat-exchanger for a Standard¹ or Controlled-Recirculation² installation in a Residential* application. All repair parts must be genuine Navien parts. All repairs and replacements must be performed by an individual or servicing company that is properly licensed to do the type of repair.
When the Product is being used in an Uncontrolled-Recirculation3 installation in a Residential* application, then the parts warranty will be reduced to three (3) years and the heat exchanger warranty to five (5) years as indicated in the Warranty Coverage Periods table.
When the Product is being used in an Standard¹ or Controlled-Recirculation² installation in a Combi4 or commercial application, then the parts warranty will remain at five (5) years and the heat exchanger warranty will be reduced to five (5) years as indicated in the Warranty Coverage Periods table.
When the Product is being used in an Uncontrolled-Recirculation3 installation in a Combi 4 or Commercial application, then the parts warranty will be reduced to three (3) years and the heat exchanger warranty to three (3) years as indicated in the Warranty Coverage Periods table.
Navien will pay labor charges for the repair subject to Navien's prior written approval and in accordance with Navien's schedule of approved labor allowances for a period of one (1) year from the date of installation.
During the applicable warranty period, replacement of the Product or components may be authorized by Navien only. Navien does not authorize any person or company to assume for it any obligation or liability in connection with the replacement of the Product or its components. If it is determined that repair or replacement of a part, under warranty, is not possible, the Product will be replaced with a new Product having at least the same BTU capacity as the product at issue. The replacement component or product will be warranted only for the unexpired portion of the applicable warranty period for the original component or Product.
Warranty Coverage Periods
Standard1 or Controlled Recirculation2
|1 Year||5 Years||15 Years|
|1 Year||3 Years||5 Years|
Commercial or Combi4
Standard1 or Controlled Recirculation2
|1 Year||5 Years||5 Years|
Standard or Controlled Recirculation3
|1 Year||3 Years||3 Years|
*Applies only to single family, residential locations
1Standard means there is no recirculation being used
2Controlled-Recirculation means recirculation of the water through the water heater is controlled by either the water heater or an external aquastat.
3Uncontrolled-Recirculation External pumps configured to circulate continuously through the water heater are subject to the uncontrolled recirculation warranty terms. An aquastat is the minimum pump control requirement for DHW or storage tank recirculation in order to maintain the full controlled recirculation warranty.
4Combi refers to a combination potable water and space heating application. Water Heaters cannot be use in space heating only applications or this warranty will be voided.