See columnist Dave Yates install a Navien NHB boiler

An outdated floor standing heating system makes way for Navien’s new high-tech wall-hung condensing modulating boiler, the NHB, in a video shot during a recent Pennsylvania retrofit. Featuring a most efficient turn down ratio of 15:1, installer Dave Yates of F.W. Behler, Inc. gives this product a “two thumbs up” while he fully expects to see an energy consumption reduction of 30-50% for his customer.  

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