THE CREST CONDENSING BOILER is now offered in models with inputs up to 5 million Btu/hr. The fully-modulating boiler features advanced fire-tube technology, low NOx emissions, a stainless steel heat exchanger and a patent-pending dual-system burner design with up to 25:1 turndown. It can deliver thermal efficiencies as high as 99%.     
CIRCLE 116 on inquiry card