Bosch ZWB35-3 Greenstar Combi 131 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent

Bosch ZWB35-3 Greenstar Combi 131 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct VentDescription:The Bosch greenstar boiler brings today's high efficiency technologies together in a single package.Astounding efficiency ratings can be achieved with the use of Bosch's condensing technology, squeezing every last BTU out of your home's gas supply.An included 3-speed Grundfos pump and a wide variety of pipe venting options allow the boiler to be installed in nearly any home imaginable.This boiler includes a domestic hot water coil, allowing the boiler to act as a tankless hot water heater as well as a hydronic boiler.General Features:Includes CRC200 Programmable Comfort Room ControllerAluminum-Silicon heat exchanger delivers high efficiency - 95% with low temperature applicationsLow NOx emissions ahead of 2012 SCAQMD regulationsSimple, intelligent control options optimize efficiency and fuel consumptionLow electrical consumption when the boiler is in standby modeElectronic ignitionAnti-cycle and modulation controlLimited lifetime heat exchanger and 5-year parts & labor warrantyAll models available as NG or LPSpecial insulation ensures ultra-quiet operationCompact dimensions and built-in frost protection offer flexibility for location of installationECO mode for energy saving fuel consumptionExclusive safety feature - keypad safety lock prevents unwanted tampering with the heating controlsAl-Si heat exchanger:Each unit features an ASME approved Al-Si heat exchanger constructed of advanced Magnesium-Aluminum-Silicon alloy - offering increased flexibility versus traditional stainless steel.They are equipped with highly durable heating blocks that are corrosion resistant and designed to optimize clean burning combustion over an extra large surface area, which requires minimal servicing and reliance on spare parts during the boiler’s lifetime.Full modulating fan assembly:A full modulating fan automatically increases or decreases its speed according to the amount of gas coming into the boiler depending on the heat demand.This process, called modulation, prevents the boiler from either having too little or too much air in the unit for optimal combustion - ensuring high efficiency.