Dave Yates from F. W. Behler, Inc., one of America’s oldest mechanical contracting firms, shares installation and maintenance tips for Navien’s NHB series condensing boilers.
This is a great video, and the guy has a great voice and speaks eloquently. Thanks! I'm tired of amateur videos with guys who can't speak. You really explained the Navien unit better than any other resource I've seen on the web.
