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U.S. Boiler Co.’s Alta line of condensing boilers and combi-boilers features next-generation gas-adaptive technology that provides the shortest installation time and lowest operating costs.
Navien NFB-H condensing fire tube boilers feature turndown ratios up to 15:1, an advanced user interface with intuitive text display and easy-to-use Setup Wizard, 2" venting up to 65', and built-in hardware to connect a boiler system pump, 3 zone pumps or 3 zone valves.
On the older hydronic systems, replacing the existing boiler with a new one was pretty straightforward. The installer connected the new boiler to the existing flue, piping and electric. The newer high-efficiency boilers are much different and require some additional planning.