Triangle Tube Keystone 850,000 BTU Output Condensing Boiler

Keystone Boilers provide promising solutions for large residential and light commercial applications. The Triangle Tube Keystone KS 850 carries a stainless steel heat exchanger with a thermal efficiency of 95.7%. The compact construction reduces needed floor space and the cabinet provides quick access to all components. To make set-up easy, there is a large user friendly interface. To maximize service life and efficiency, up to 8 boilers can be joined in a cascade. Features 160 psi maximum working pressure 75 psi (517 kPa) ASME Rated pressure relief valve 5 to 1 turndown ratio Stainless steel heat exchanger (no gaskets) Vertical or horizontal direct vent Holds, alerts, and errors notifications Sealed combustion chamber Built-in condensate trap Vent temperature cutoff Direct spark ignition Outdoor reset -custom reset curves, domestic hot water priority, warm weather shutdown Installation & Warranty Information We suggest that the installation of any Triangle Tube boiler or water heater to be completed by a ...