Greenstar Heatslave II External overview
Our Greenstar Heatslave II is the UK's most popular external oil combi boiler with flow rates up to 22l/min.
Suitable for small, medium and large sized properties, this boiler features a robust weatherproof cabinet 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 + £40 (Non-WAI loyalty members only)*
- 7 year
*Available to loyalty scheme members only. Non-WAI’s can achieve this extended guarantee length with an additional payment of £40. Terms and conditions apply.
Features & Benefits
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Cross firing burner
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One piece baffle for quick and easy servicing
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Easy access oil and hydraulic connections
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Digital control offering precision heating and hot water control
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Lightweight aiding installation
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Front access for routine servicing, including a pivoting expansion vessel for ease of access
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Compatible with our Greenstar Comfort controls
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A robust, durable external cabinet that blends in with the garden
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IP45 Protection – protecting the boiler from water, dust and external elements
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5 year guarantee on Worcester primary heat exchanger
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80/125mm room sealed flues with lengths of up to 8m available
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Plume management of up to 5m with conventional and flexi-flue kits also available
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Technical details
Greenstar Heatslave II External 12/18 2022+
- Part number
- 7 731 600 263
- ErP Data Sheet
- ErP Data Sheet
- Fuel Type
- Oil
- Control Options
- EasyControl Compatible
- Solar Compatible
- Central heating output (kW)
- 18
- Dimensions (mm) height x width x depth
- 950 x 640 x 770
Greenstar Heatslave II External 18/25 2022+
- Part number
- 7 731 600 264
- ErP Data Sheet
- ErP Data Sheet
- Fuel Type
- Oil
- Control Options
- EasyControl Compatible
- Solar Compatible
- Central heating output (kW)
- 25
- Dimensions (mm) height x width x depth
- 950 x 640 x 770
Greenstar Heatslave II External 25/32 2022+
- Part number
- 7 731 600 265
- ErP Data Sheet
- ErP Data Sheet
- Fuel Type
- Oil
- Control Options
- EasyControl Compatible
- Solar Compatible
- Central heating output (kW)
- 32
- Dimensions (mm) height x width x depth
- 950 x 640 x 770
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