Navien NHB-055 User's Information Manual page 22

Warranty Exclusions
Navien's Limited Warranty shall be void in the event of an
occurrence of any of the following:
Improper installation, failure to install in strict compliance with
the Installation & Operation Manual procedures, installed by a
non-licensed installer, and installation in violation of applicable
rules, laws or building codes.
Product purchased through the internet, other e-commerce
channels, or any installer that obtained the product from a
supplier or distributor not authorized by Navien.
Failure to perform regular maintenance, misuse, operation at
settings other than those recommended or specified, non-
compliance with instructions or guidelines set forth in the User's
Information Manual.
Modification or alteration of the product in any manner,
including but not limited to, removal of any component or
part, addition of any non-approved components, relocating
or moving the product from its original installation site, or any
accidental or intentional damage to the Product.
Installation for non-recommended uses.
Any damage caused by local adverse conditions including but
not limited to hard water deposits, lime or mineral build-up,
operating in corrosive atmospheric elements.
Damage or problems caused by gas flow issues, electrical surges,
flooding, fire, abnormal external temperature, and any other
cause of damage not directly caused by a manufacturing defect.
Installer's failure to fully comply with the warranty service and
return policy procedures previously provided to installer and
as is available on Navien's website. Such policies include but
are not limited to the installer's failure to first contact Navien
Technical Support while in front of the product for purposes of
trouble shooting the identified problem or issue.
Performance problems caused by improper sizing of the boiler,
the gas supply line, the venting connection, combustion air
openings, electric service voltage, wiring, fusing or any other
components, parts or specifications.
22 Warranty
Improper conversion from natural gas to LP gas or LP gas
to natural gas or attempt to operate with a type of gas not
specified for the boiler.
Any damage, malfunction or failure caused by abuse,
negligence, alteration, accident, fire, flood, freezing, wind,
lightning and other acts of God.
Operating, using or storing the boiler in a corrosive or
contaminated atmosphere or environment.
Operating the boiler at water temperatures outside the factory
calibrated temperature limits and/or exceeding the maximum
setting of the high limit control.
Operating the boiler when it is not supplied with potable water
at all times.
Subjecting the heat exchanger to pressures or firing rates
greater or lesser than those shown on the rating plate.
Installation at any location outside the United States and
Canada.
Removal or alteration of the rating plate.
Other Terms: This Limited Warranty is subject further to the terms
and conditions set forth herein and as may be further specified
in the terms and conditions page located on Navien's website
at www.navien.com. WITH THE EXCEPTION OF THIS LIMITED
WARRANTY, NAVIEN DISCLAIMS ANY OBLIGATION OR LIABILITY
WITH RESPECT TO THE PRODUCTS OR THEIR SALE AND USE, AND
NAVIEN NEITHER ASSUMES NOR AUTHORIZES THE ASSUMPTION
OF, ANY OBLIGATION OR LIABILITY IN CONNECTION WITH THE
PRODUCTS. THIS DISCLAIMER INCLUDES ANY OTHER WARRANTIES,
EXPRESS, IMPLIED OR STATUTORY RESPECTING THE PRODUCTS
OR ANY PARTS OR COMPONENTS THEREOF, INCLUDING, BUT NOT
LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. Navien's total liability
for any claim arising hereunder shall not exceed the purchase
price which you paid for the product. NAVIEN SHALL NOT IN ANY
EVENT BE LIABLE FOR INDIRECT, SPECIAL, CONSEQUENTIAL OR
LIQUIDATED DAMAGES OR PENALTIES, INCLUDING CLAIMS FOR
LOST REVENUE, PROFITS OR BUSINESS OPPORTUNITIES, EVEN IF
NAVIEN HAD OR SHOULD HAVE HAD ANY KNOWLEDGE, ACTUAL
OR CONSTRUCTIVE, OF THE POSSIBILITY OF SUCH DAMAGES.