Navien NR/NP Series Reviews
The Navien NR series is geared for the residential user. Each one is made using heavy duty stainless steel heat exchanger with fin-type design for maximum efficiency. The condensing heat exchanger allows for increased thermal efficiencies up to 98% that allow you to get the absolute most out of every energy dollar. Navien offers the best warranty in the business, with the heat exchangers covered for 15 years in residential settings and 10 years for commercial water heaters.
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