Worcester Heatslave 12/18 Oil Combi Boiler Review

Although the vast majority of combi boilers in the country run on the mains gas, there are many models, such as the Worcester Heatslave 12/18 oil combi boiler, that use a different fuel source. This could be because the property in which it is situated is not connected to the main gas network. Often, new housing estates built out of town are placed beyond the network and, instead, households must find a different way to heat their radiators and hot water.

If you find yourself in this situation, or you simply prefer the idea of using oil to fuel your boiler rather than gas, the Worcester Bosch Greenstar Heatslave 12/18 combi oil boiler is a great choice. This is the smallest of the Greenstar Heatslave II series and is ideal for small homes and flats with a single bathroom. It is efficient, reliable and robust enough to fulfill your heating needs without wasting excess energy.

Worcester Bosch is our recommended boiler manufacturer and is well respected across the UK by both customers and boiler professionals too. Those who spend their days fitting and fixing boilers are impressed by the build quality of Worcester Bosch units and the ease of mending and servicing them. Customers talk warmly of the many years’ excellent service they receive from devices such as the Worcester Heatslave 12/18 oil combi boiler.

Worcester Heatslave 12/18 Oil Combi Boiler Features

The main features of the Worcester Heatslave 12/18 oil combi boiler are:

  • Precision design to look great, with covered controls to maintain the sleek appearance.
  • Compact to fit underneath a standard kitchen cabinet.
  • Can be used with green water heating methods such as solar panels to increase efficiency.
  • Precision controls to prevent wasted energy from overheating.
  • Compatible with wireless controls.
  • Eco Hot Water mode saves energy.

With a boiler, there is always a choice between having it on display on the wall and being hidden away. The Worcester Heatslave 2 range is designed so that, either way, your boiler fits into your home. If it is out in the open, it looks good thanks to its sleek design and concealed controls. If you would prefer to hide it away, the dimensions of the Worcester Bosch Greenstar Heatslave 12/18 combi oil boiler mean that it fits under a standard kitchen counter.

With the Worcester Heatslave 12/18, you can be sure that your rooms are heated to the exact temperature you require. The precision controls make sure that you don’t spend unnecessary money on your energy bills, overheating your home. Another saving can be made by using the Eco Hot Water mode, which means that you just need to wait a little longer for your water to heat up than in ‘always on’ mode. Similarly, the use of smart controls, such as Worcester Bosch’s very own EasyControl system, increases efficiency of the Worcester Greenstar Heatslave 12/18.

Cost of a Worcester Bosch Greenstar Heatslave Boiler

The cost of a Worcester Bosch Greenstar Heatslave boiler depends on a range of different factors. The size of the boiler often plays a part. For example, the Worcester Heatslave 12/18 oil combi boiler will typically cost less than one of the larger models in the Worcester Heatslave 2 range.

Aside from the size of the boiler, the amount of work needed to fit your Worcester Bosch Greenstar Heatslave boiler dictates the cost too. If you are replacing a combi boiler for another combi boiler in the same position, this will be a more simple job than if you previously had a system or regular boiler and swapped it for a Worcester Heatslave 12/18 oil combi boiler.

Moving the location of your boiler brings costs for things like moving the pipework around and installing a new flue too. This is why it affects the cost of a Worcester Bosch Greenstar Heatslave boiler so much.

If you have not used an oil combi boiler before, you will also need to install an oil tank at the same time as you fit your Worcester Heatslave 12/18 combi. This tank holds the fuel that you need to run the boiler and you must make sure that there is always enough left to keep your house warm and the hot water running.

If you want to find out the precise price you will pay for your Worcester Heatslave 12/18, contact us for a free, no obligation home survey. An experienced staff member will visit your property and assess the job. They will provide a fixed quote for the entire cost of putting in your Worcester Bosch Greenstar Heatslave 12/18 combi oil boiler, which will remain valid for a period of time while you decide on whether to proceed.

Other Worcester Heatslave 2 Oil Combi Boilers

When our surveyor comes to your home to provide a quote for your boiler installation, they will also make sure that the Worcester Heatslave 12/18 is the right sized boiler for you. If they believe that your heating and hot water usage, taking into account the heat loss from your property, requires a larger boiler, they will let you know.

Thankfully, there are two more Worcester Heatslave 2 oil combi boilers in the same range and they provide all of the same top quality features as the Worcester Heatslave 12/18. The 18/25 and 25/32 models will bring similar efficiency and reliability but with that added punch to keep medium and large properties warm.

You can also explore the Worcester Heatslave 2 External oil combi boiler range. These come in exactly the same sizes as the regular Heatslave boilers, but are designed to be placed outside the home and perform their duties externally. With a Worcester Heatslave 2 external oil combi boiler, you get a robust outer shell to protect it from the elements. It is coloured green so that it blends in with the garden environment too. Other than that, the Worcester Greenstar Heatslave II 12 18 external oil combi boiler works in exactly the same way as its internal equivalent.

If you are interested in having a Worcester Heatslave 12/18 oil combi boiler installed in your home, contact us today on 0330 055 2210 and book in a free home survey.

worcester bosch logo
  • A-rated for efficiency for central heating and hot water.
  • Looks stylish and modern in your home.
  • User-friendly controls.
  • Connectivity is a smooth and simple.
  • Powerful models up to 50kW.
  • Runs quietly in your home.
  • Trusted, industry-leading manufacturer.
  • Highest hot water flow rates of any boiler on the market.

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My wife and I would like to thank you all for the competence and excellent work carried out at our home, from the estimate and the fitter who plumbed in the new boiler, to the electrician who made our programmer work with the boiler, an excellent team of manpower seldom seen with so called professionals.

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Thanks Tom for all your patience and time you spent answering all my questions and promptly ringing me back each time and thanks to your office staff always polite and helpful, a big thank you to John and Chris for installing the boiler and all the other jobs, both worked efficiently and cleanly, John was very good explaining everything as he went along. 

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Brilliant service from all the team. Thanks. Our old boiler died and from a very reasonable quote to fitting a new one within a couple days. Excellent advice and workmanship too.

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My old boiler went kaput, Clever Energy Boilers gave me a great price and fitted my new boiler within 3 days. Very pleased with the work carried out and would not hesitate to recommend to anyone needing a new boiler. A big thank you to both the installation team and the electrical man, both first class.

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