Greenstar Heatslave II Greenstar Heatslave II Greenstar Heatslave II
Greenstar Heatslave II Greenstar Heatslave II Greenstar Heatslave II
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Greenstar Heatslave II overview

Our Greenstar Heatslave II is the UK's most popular oil combi boiler with flow rates up to 22l/min.

Suitable for small, medium and large sized properties, this boiler features easy access connections and a one piece stainless steel primary baffle and cross firing burner.

The next generation Heatronic 4i digital control unit provides accurate control and diagnostic information.

Download our easy guide, which covers everything you need to know about the Heatslave II

Standard Guarantee 

  • 2 Year

With any Greenstar System Filter

  • 5 Year

With any Greenstar System Filter + £150 (Non-WAI Excelerate members only)*

  • 7 year

*Available to Excelerate members only. Non-WAI’s can achieve this extended guarantee length with an additional payment of £150. 

Features & Benefits

Cross firing burner
One piece baffle for quick and easy servicing
Easy access oil and hydraulic connections
Digital control offering precision heating and hot water control
Lightweight aiding installation
Front access for routine servicing, including a pivoting expansion vessel for ease of access
Compatible with our Greenstar Comfort controls
Compatible with solar thermal
5 year guarantee on Worcester primary heat exchanger
80/125mm room sealed flues with lengths of up to 8m available
Plume management of up to 5m with conventional and flexi-flue kits also available

Related Accessories

Boiler Accessories Part number
CondenseSure 7 716 192 746
Greenstar Comfort wall mounting plate 7 733 600 039
EasyControl Adapter 7 736 701 560 Installation Manual
Flashing Kits Part number
Flat roof flashing kit (100mm & 125mm dia.) 7 716 191 090
Pitched roof flashing kit (100mm & 125mm dia) 7 716 191 091
Flue Part number
1000mm extension kit, 100mm dia 7 716 190 066
45º bend, 100mm dia 7 716 190 069
45º bend, 80/125mm 7 716 190 035
500mm extension kit, 100mm dia 7 716 190 067
90º flue bend 7 716 190 034
Flue extension, 80/125mm 7 716 190 033
Greenstar Oilfit 100mm flexible flue kit, 12m 7 716 190 077
Greenstar Oilfit 100mm flexible flue kit, 8m 7 716 190 076
Flue Damper 7 716 190 101
Stainless steel flue terminal guard 7 716 190 050
Telescopic extension 100mm dia 7 716 190 068
80/125 standard telescopic flue kit 7 716 190 064
80/125 short telescopic flue kit 7 716 190 062
Wall cover plate kit 100mm dia. 7 716 190 074
600mm extension 7 716 190 097
Conventional vertical flue kit, 100/103mm 7 716 190 104
Infill plate kit (for high level horizontal flues) 7 716 190 105
Plume Part number
Plume management kit 7 716 190 092
Plume management 45º bend 7 716 190 094
Plume management 90º bend 7 716 190 095
1,000mm extension 7 716 190 093

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