Navien NHB-055 User's Information Manual page 21

LIMITED WARRANTY NAVIEN, INC.
Warranty Period
Navien products come with a limited warranty covering labor,
parts and the heat exchanger. The following warranty periods
begin to run from the date of original installation. The date of
original installation must be provided to Navien, and upon request,
proof of the original installation date must also be provided to
Navien. When the product is installed in a new construction, the
commencement date shall be dated upon which the end-user
takes title to the property.
APPLICABLE WARRANTY PERIOD
Heat
Exchanger
Residential
15 years
Commercial
10 years
All other
parts and Labor
components
5 years 1 year
3 years 1 year
Warranty Claim Procedures
To obtain warranty repair service, the end user or homeowner
must contact the original installer of your Navien product. If the
original installer cannot be identified, the end user or homeowner
may contact Navien's Technical Administration Department at
(800) 519-8794. Proof of purchase is required to obtain warranty
service.
Warranty Service
At its option, Navien will replace the defective component (part(s)
or heat exchanger), in accordance with the terms of this Limited
Warranty, if it fails in normal use and service during the applicable
warranty period identified above. The replacement component
must be Navien original factory component. Navien, at its sole
discretion, may replace the product with a new or refurbished
product of comparable quality and design. The replacement
component or product will be warranted only for the unexpired
portion of the original component's applicable warranty period.
Payment for labor in completing the warranty service is subject
to Navien's prior written approval and shall be subject to Navien's
schedule of approved labor allowances.
Warranty 21