HTP’s EnduroTi is a large-mass condensing boiler manufactured out of stainless steel AISI 316Ti. It is equipped with a hyper-jet combustion system with a patented modulating inward firing burner. This high-mass, fire-tube design promotes improved heat transfer when used with its stainless-steel and titanium-based three-pass heat exchanger. The unit is up to 93% thermal efficient, with up to a 10:1 turndown ratio. It is available in two Btu sizes: 750,000 and 1 million. It is able to operate at altitudes of 4,500’ above sea level without additional parts or adjustments.