HTP’s EnduroTi is a large-mass, stainless-steel condensing boiler with a hyper-jet combustion system that includes a patented modulating inward firing burner. This high-mass, fire-tube design promotes improved heat transfer when used with its three-pass heat exchanger. The unit is up to 93% thermal efficient, with up to a 10:1 turndown ratio. It is available in 750,000 Btu and 1,000,000 Btu sizes. It is able to operate at altitudes of 4,500’ above sea level without additional parts or adjustments.
HTP commercial condensing boiler
![HTP commercial condensing boiler](http://www.pmmag.com/ext/resources/PM/2016/April-2016/PM0416_Products_HTP.png?1461349148)