Greenstar Boilers Provide Ultra Efficient Heating

June 7, 2011

The Bosch Greenstar series of ultra efficient wall mounted condensing boilers utilize condensing technology, where the latent heat in the unit’s exhaust gases is extracted and re-used, to provide extremely energy efficient heating to homes and commercial spaces. The condensing technology is a highly efficient use of energy and significantly reduces carbon dioxide emissions into the atmosphere.

Greenstar condensing boilers can offer efficiency levels of up to 98.7 percent, meaning they turn 98.7 percent of the fuel used into heat – a significant upgrade compared to traditional or non-condensing boilers. As a wall-hanging unit with multiple size configurations based on need, the Greenstar series can also free up valuable floor space inside the home.

The condensing boilers feature industry-leading design and technology components built for years of reliable operation and optimal energy efficiency. A fully modulating fan automatically increases or decreases its speed according to the gas amount coming into the combi boiler based on heat demand. This modulation of fan speed prevents the combi boiler from either having too little or too much air in the unit for optimal combustion – assuring high efficiency.

The unit’s durable heating blocks are corrosion resistant and designed to optimize clean-burning combustion over an extra large surface area, and they require minimal servicing and reliance on spare parts during the boiler’s lifetime.

Greenstar boilers offer easy and secure access for maintenance and servicing. The Bosch Heatronic III, a device integrated into the base of the boiler, provides instant access to the hot water and heating controls, and a removable front panel provides direct access to the boiler’s heat cell. A plug-in diagnostics module further streamlines the unit’s serviceability. A keypad safety lock button feature prevents unwanted tampering, triggering a disable feature, audible alarm and error code for increased reassurance to homeowners with children.

The included FW200 digital thermostat and outdoor reset boiler control act as the nerve center of a home’s heating system. Programmable with up to six switching times throughout the day, this interface can be installed within the appliance or be wall mounted in any location throughout the home. Control of up to four devices in cascade is possible. Additional Bosch products, including solar applications, can be programmed using supplemental module control options from the unit.

Bosch offers tankless, point-of-use and heat pump electric water heaters, solar thermal systems, floor-standing and wall-hung boilers, geothermal systems, as well as controls and accessories for every product line.

Photos courtesy of Bosch Thermotechnology.



Dawn Killough

has over 15 years experience in the construction industry and is the author of Green Building Design 101, an e-book available from Amazon. She is a LEED AP and Certified Green Building Advisor, and has worked on the LEED Certification of three projects in Salem, Oregon.