Bosch ZWB35-3 Greenstar Combi 131 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent (ZWB35-3, Unico)
Bosch ZWB35-3 Greenstar Combi 131 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
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.
Includes CRC200 Programmable Comfort Room Controller
Aluminum-Silicon heat exchanger delivers high efficiency - 95% with low temperature applications
Low NOx emissions ahead of 2012 SCAQMD regulations
Simple, intelligent control options optimize efficiency and fuel consumption
Low electrical consumption when the boiler is in standby mode
Anti-cycle and modulation control
Limited lifetime heat exchanger and 5-year parts & labor warranty
All models available as NG or LP
Special insulation ensures ultra-quiet operation
Compact dimensions and built-in frost protection offer flexibility for location of installation
ECO mode for energy saving fuel consumption
Exclusive safety feature - keypad safety lock prevents unwanted tampering with the heating controls
Al-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.
The Unico System uses less than one-third of the space in the built environment than a traditional system. It can deliver up to 9 tons of air conditioning in the same space as a 3-ton traditional unit.