Faster installation

With features from our 8000 Style, insights from installers and featuring real advances in siting flexibility, we’ve taken what was the UK’s favourite boiler and made it better.

Simple Switch

SimpleSwitch

  • Seamless swapping out of i Junior, Si combi and i System boilers (2005-2015).
  • Fixing points, pipe centres and distance from flue to valves match predecessors for minimum re-work.
  • Wall-frame provides a pre-piping option for all pipe connections before the boiler is hung.
  • SimpleSwitch flue adaptor available to allow, in particular cases, re-use of the existing flue hole through the building fabric.

PRV pre-fit elbow

PRV pre-fit elbow

  • Supplied with the boiler, the elbow is designed to be angled for SimpleSwitch installations.
  • You can simply connect to existing i Junior, Si or i System PRV pipework that is often difficult to replace.
  • You just need to provide one 90 degree copper fitting to link the pipework.
  • PRV pre-fit piping can go straight back to the wall if SimpleSwitch isn’t required.

Simple Switch models include:

• Greenstar i Junior combi (2005 – 2013)

• Greenstar i Junior combi (2013 – 2015)

• Greenstar Si combi (2005 – 2013)

• Greenstar i ErP (2015 – 2021)

• Greenstar i System (2005 – 2015)

• Greenstar i System ErP (2015 – 2021)

Longer flue lengths

Longer flue lengths

  • Maximum flue lengths up to 12m (60/100mm), when run horizontally or vertically.
  • Improved flue length reduction on bends of 0.5m (45°) and 1.5m (90°).

Condensate siphon

Condensate siphon

  • The large capacity 500ml condensate siphon increases the volume of condensate discharge.
  • Significantly reduces the risk of freezing with the siphonic release increasing speed of flow, pre-warmed to internal boiler temperatures.
  • Real homeowner peace of mind during cold snaps.
  • Reduction of potential nuisance call-outs.

Control key

Control key

  • Similar to our 8000 and 2000 range, the 4000 is compatible with our ‘RF key’.
  • Provides wireless RF communication between the boiler and our compensating controls.
  • Enables you to quickly and easily fit our wireless Bosch EasyControl, Greenstar Comfort+ II RF and other Comfort+ controls.

 

Find out more about the 4000 controls and accessories

Wiring

Wiring

  • The wiring connections can be accessed via one retained screw.
  • Simple wiring layout inherited from our top-of-the-range 8000 range.
  • Clear layout of connections makes installing third party controls straightforward.