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    Worcester Bosch Greenstar Heatslave II Boilers

    You can expect to pay between £2,256 and £2,500 for a Worcester Bosch Greenstar Heatslave II Boiler, which includes VAT and excludes the cost of installation.

    Worcester Bosch Greenstar Heatslave II Boilers

    Known for being one of Worcester Bosch’s most popular oil combi boilers, the Greenstar Heatslave II is a floor standing appliance that measures 855mm (H) x 520mm (W) x 600mm (D).

    It’s suitable for kitchen or utility room installation and will fit neatly underneath your worktop between your cabinets and electrical goods. This boiler can be purchased with an output of 18kW, 25kW or 32kW and maximum flow rates of 15, 18 or 22 litres per minute respectively.

    Since this model comes in three sizes, there is a solution available for small, medium and large-sized homes with one or two bathrooms. You will need to spend between £2,256 and £2,520 on the Greenstar Heatslave II, which includes a standard 2-year manufacturer warranty.

    Boiler Energy Efficiency Credentials

    The Greenstar Heatslave II has a SEDBUK efficiency rating of 90% and is A rated for heat and B rated for water. It is designed to provide high levels of efficiency and works with water heated by green sources including solar energy and wood-fired boilers for maximum efficiency. The boiler features an energy-saving ECO mode that alters the cycling function of the burner to allow it to cool more before reheating to your desired temperature. This floor standing appliance can also be used with various optional Worcester controls such as a programmable room thermostat to increase both efficiency and your comfort levels.

    Greenstar Heatslave II Technology and Main Advantages

    This model features built-in frost protection to protect the boiler when installed in cold areas, as well as a primary heat exchanger with one-piece baffle for quick and simple servicing and maintenance. It is supplied with 80/125mm room sealed flues with lengths of up to 8m, along with plume management of up to 5m.

    The Greenstar Heatslave II is a great combi boiler option for families with small children because its user controls are concealed in a drawer. It also offers precise heating and hot water control and has a position for an optional programmer so that you can set specific times for your central heating to switch on and off throughout the week.

    A ‘keep hot’ facility and an inbuilt thermal store are included so that you always have instant access to hot water and for prolonged periods. Not forgetting the ECO mode, which is an energy-saving function that ensures the burner fires less frequently between demands and maintains the heat store temperature at a lower level while making sure your hot water set point stays the same.

    Is the Greenstar Heatslave II the Right Boiler Type and Size for Your Home?

    Worcester Bosch’s Greenstar Heatslave II is suitable for small, medium and large properties, and the output level you choose will depend on the size of your home, your household’s requirements and how many bathrooms you have. It’s also a great solution for homes with limited space because there is no need to install a cold water tank or hot water cylinder. However, this information should be used as a rough guide, and you must ask a qualified engineer to assess your heating and hot water needs before shopping around for a new boiler to ensure you pick the right model.


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    A-rated conventional boilerSave money on your gas bill
    ECO hot water modeSaves energy
    Concealed boiler controls Ideal for families with young children
    Keep hot functionEnsures hot water is instantly available
    Frost protectionNo risk of frost damage
    Compatible with optional controlsGreater comfort and energy efficiency
    Accepts pre-heated hot water from renewable sourcesLowers fuel bills and protects the environment
    2-year parts and labour warrantyConfidence and peace of mind

    Our Honest Opinion of the Worcester Bosch Greenstar Heatslave II

    Providing a range of outputs to meet the needs of most homes, the Greenstar Heatslave II is a modern, high-performance combi boiler that can be sited almost anywhere in your property. Although a combi, the larger output models will deliver plenty of heating and hot water to larger dwellings with multiple bathrooms.

    We like that the control interface is neatly concealed within a slide open draw to prevent your small children from touching control knobs and dials but still allows you to manage heating and hot water delivery. The boiler also has an easy to read backlit display and provides heating and hot water from one sleek unit.

    This appliance is energy efficient as it comes and has the benefit of a pre-heated thermal store for instant hot water, however, environmental benefits and cost savings can be increased when used with pre-heated hot water from renewable sources. Taking everything positive into account, we can understand why so many homeowners have chosen this oil-fired combi by Worcester Bosch over alternative heating and hot water systems.

    Advice on Boiler Quotes and OFTEC Registered Technicians

    If you’re thinking about purchasing the Worcester Bosch Greenstar Heatslave II Boiler, be sure to obtain quotes from local and national installers for the best deal and ask for a fixed price on the appliance and fitting costs to avoid paying any hidden fees. You also need to make sure your chosen installer is OFTEC registered for peace of mind that you are selecting a qualified technician who can work safely on oil-fired boilers. To check this, ask to see the details on the installer’s ID card or run a search at the official OFTEC website.


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    One thought on “Greenstar Heatslave II

    1. Hi
      Quote Required
      Worcester Oil Fired Boiler replacement . Currently Heatslave 15/19.
      Price to supply only and price to supply and fit.
      Position is in kitchen under counter , so straight forward easy replacement.
      Tel 07814128688
      1 Foxhall Cottage
      Banbury Road
      Northamptonshire NN11 3YY
      Mr Nash

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