Navien NPN User Manual

Getting Service
If your water heater requires service, you have several options for getting service:
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Contact Technical Support at 1-800-519-8794 or on the website: www.navieninc.com.
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For warranty service, always contact Technical Support first.
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Contact the technician or professional who installed your water heater.
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Contact a licensed professional for the affected system (for example, a plumber or electrician).
When you contact Technical Support, please have the following information at hand:
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Model number
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Serial number
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Date purchased
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Installation location and type
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Error code, if any appears on the front panel display
800.519.8794 www.navieninc.com
20 Goodyear lrvine, CA 92618
Installation & Operation Manual
NPN Non-Condensing Water Heaters
TANKLESS WATER HEATERS · BOILERS
Version: 1.0 (January. 2021)

Navien NPN Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Efficiency	Up to 0.96 UEF
Voltage	120V
Temperature Range	98°F - 140°F
Installation Type	Indoor/Outdoor
Max GPM	11.2 GPM
Gas Connection	3/4 inch NPT
Water Connection	3/4 inch NPT
Vent Size	2 inch or 3 inch PVC/CPVC
Warranty	15 years heat exchanger, 5 years parts