Floor Standing Gas Boilers - Bosch

GB312

2 Boiler Cascade Outputs: 180kW - 560kW

2 Boiler Cascade Outputs: 180kW - 560kW

Boiler Outputs: 90kW, 120kW, 160kW, 200kW, 240kW, 280kW

A compact and modern floor-standing commercial condensing boiler, solidly built to provide reliable and efficient heating performance year after year. The GB312 is an excellent choice for medium to large buildings, office blocks and commercial installations that require the latest in environmentally friendly heating technology.

 

Features & Benefits

  • Output 90 - 280kW with GB312 2 boiler cascades (180 - 560kW)
  • Lightweight and compact to fit into existing boiler rooms
  • Quick and simple to install and service - spacious interior with all parts accessible from the front
  • High efficiencies of up to 108% (NCV)
  • Modulating pre-mix gas burner for extremely quiet operation
  • Up to 30K Δ T operation – optimising efficiency
  • High-performance aluminium heat exchanger for maximum heat transfer
  • Insulated boiler block to minimise heat loss
  • Compatible with intelligent controls with built-in Energy Management System (EMS)
  • Supplied with BC10 boiler control with digital service diagnostic and status display
  • Burner management technology
  • Can have a balanced flue or open flue arrangement
  • Fully compatible with the 4000 controls range – offering system flexibility
  • Low NOx – <40mg/kWh (dry, 0% O2)
  • Able to control fully modulating primary pumps – maximising condensing benefits

Multi Boiler Cascade

If demand for heat is high, it is also possible to install the GB312 as a two boiler cascade system offering potential heat outputs of up to 560kW. The cascade system contains all parts necessary for the installation and can be connected to the existing system, saving time and reducing installation costs.

GB402

Cascade Output: 640kW - 1240kW

Cascade Output: 640kW - 1240kW

Single Boiler Outputs: 320kW, 395kW, 470kW, 545kW, 620kW

A floor standing, condensing gas boiler, the GB402 is fitted with a cast aluminium heat exchanger and thermally-insulated boiler body. The GB402 is perfect for single or multiple boiler installations in medium to large buildings including schools, hotels, care homes, offices and commercial buildings. Compact, quiet and perfect for both new build and renovation projects it combines high efficiency with low emissions.

The GB402 is available in 5 individual boiler outputs – 320kW to 620kW and has been developed to provide lower running costs and reduced carbon and NOx emissions and with a seasonal efficiency of up to 110%.

 

Features & Benefits

  • Output: 5 single boiler 320 - 620kW and GB402 multiple boiler Cascades from 640 - 1,240kW
  • Suitable for use with a wide range of controllers (RC35, EM10, MCM10, 4000 series)
  • Optimised design of heat exchanger water- and flue- channels for maximum efficiency
  • Optimised for effective and robust operation
  • Up to 30K Δ T operation – optimising efficiency
  • Easy installation, commissioning and maintenance
  • Fully modulating pre-mix burner
  • Suitable to use with balanced flue arrangement
  • Efficiency (NCV) up to 110.4% at 40/30ºC
  • NOx emissions below 40mg/kWhr
  • Maximum operating pressure of 6bar
  • Extremely quiet, operates below 60dB(A) at full load
  • Weight (depending upon output) 410kg to 520kg
  • Able to control fully modulating primary pumps – maximising condensing benefits
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