Vokera is a reliable and trusted boiler manufacturer that have a good reputation for their new boiler range and great improvements have been made on their system boiler range.

Vokera Evolve 30S System

The Vokera Evolve 30S system boiler is one of the most popular models in the range from this manufacturer that has bases across the UK and Ireland. Whether your central heating and hot water work on natural gas or LPG, the Vokera Evolve 30S is set up to accommodate your needs.

This model is efficient enough to help you make savings on your heating bills while reducing your carbon footprint. It is A-rated for both central heating and hot water. Official tests give it a rating of 94% space heating efficiency. You can even boost that efficiency further by adding on optional extras such as an OpenTherm control or weather compensation sensor.


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Inside the Vokera Evolve 30S is an inbuilt carbon monoxide sensor, which shuts the device down if excess CO is detected. You will not be able to get the boiler to work until the situation has been rectified, which offers great peace of mind to homeowners.

The Vokera Evolve 30S system boiler comes with a ten-year guarantee as standard, which is longer than many other models available. However, Vokera boilers sometimes experience reliability issues, with both customers and heating engineers reporting only average satisfaction when questioned. Our recommended boiler brand is Worcester Bosch, which consistently tops polls of the most reliable devices around.

Vokera Evolve System Boiler

vvokera 3okw system boilers

Here are the main features of the Vokera Evolve system boiler:

  • A-rated for central heating and hot water.
  • Compact design.
  • Liquid display controls with full text display.

When you buy a Vokera Evolve 30S system boiler, you also need a storage cylinder in which to keep your hot water. This feeds your showers, baths and sinks when you turn the tap on, meaning that you do not need to wait for the water to heat up like you do with a combi boiler. As the hot water is ready to go, a system boiler is better suited to larger homes or those where there is high demand in multiple bathrooms.

When you contact Clever Energy Boilers about your boiler replacement, we can not only advise on the boiler that best suits your home and family, but also on the perfect hot water cylinder to accompany your Vokera Evolve 30S system boiler.

The Evolve range is one of two types of system boiler from Vokera. The other is the Vokera Vision S. Both feature models with a variety of different outputs, ensuring that they meet the requirements of a range of homes.

Vokera Evolve Price


When it comes to the Vokera Evolve price, what you end up paying depends on a number of factors. Usually the cost increases as you buy a more powerful device. For example, the Vokera Evolve 30S system boiler will cost more than the 18S by virtue of it being able to output more energy.

You also have to consider the cost of the work involved in installing your Vokera Evolve 30S. If you are swapping an old, inefficient system boiler for a new model and are intending it to be fixed in the same place and use the same hot water cylinder, you will pay less than if you are changing a combi boiler for a system boiler in a new position in your home and with a brand new cylinder.

When we visit your house to perform a free, no-obligation home survey, we will find out all of these details and be able to give you a fixed quote that includes all of the labour costs as well as the boiler-only Vokera Evolve price.

Vokera boilers sit in the cheaper end of the spectrum, but there is a good reason for that. You do not receive the same build quality with a Vokera that you do with a Worcester Bosch boiler and, when it comes to keeping your home toasty, that is worth considering when looking at a new boiler.

Vokera Evolve Boiler Size

There is a selection to choose from in terms of Vokera Evolve boiler size. The Vokera Evolve 30S system boiler is the second largest in the Evolve S range. The most powerful of them is the 35S, with the 18S being the smallest. These numbers relate to the kW output of the individual model, which determines the size of home they are best suited to serving. The larger the number, the more powerful the boiler.

Another Vokera Evolve boiler size consideration to make is the physical size of the unit. The range is designed to be compact, with the smaller models able to fit within a standard kitchen cupboard. However, the Vokera 30S system boiler, as well as the 35S, are too large to contain in a similar manner. If hiding away the boiler from sight is important to you, it is worth knowing this information in advance.

In order to discover the perfect Vokera Evolve boiler size for your home, you can book in a free home survey. We send a trusted staff member to assess your boiler needs. They take into account the number of bedrooms, radiators and bathrooms as well as the heat loss from your property before recommending the perfect boiler. If you are keen on installing the Vokera Evolve 30S system boiler, the survey will let you know whether it is powerful enough to meet your needs, but not over-powered so that it hinders the boiler’s efficiency and affects the savings you should be making on your heating bills.

Vokera Evolve Combi Boiler

ERP energy efficiency ratingIn smaller homes and those with just one or two bathrooms, you might prefer to install a Vokera Evolve combi boiler instead. The home survey will flag up whether a combi boiler or a system boiler will be the best option. In certain circumstances, it might be that you have a choice between either option. Fitting a Vokera Evolve combi boiler means not having to install a hot water cylinder too, as you would need to with a Vokera Evolve 30S system boiler.

The Vokera Evolve C is the combi boiler version of the Evolve S system boiler range. They come in sizes starting at 24kW up to a maximum of 42kW. They also come with a ten-year warranty and similarly meet the requirements to be A-rated for efficiency. As with the system boiler version, there is an in-built carbon monoxide monitor and a clear, easy to use interface to make it simple to diagnose any problems that you might have with the Vokera Evolve combi boiler.

To book in a home survey and chat to us about getting hold of a Vokera Evolve 30S system boiler or combi boiler, call 0330 055 2210 and talk to our friendly call centre team. You can also use the contact form on this page.

vokera logo
Vokera system boiler
  • A-rated for central heating and hot water.
  • Compact design.
  • Liquid display controls with full text display.
  • Natural gas or LPG out of the box
  • 10 year warranty as standard
  • Four output options – 18 to 35kW
  • Compact dimensions enable the boiler to be sited anywhere
  • Iincluding within a kitchen cupboard (18S & 24S models only)

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What customers say about Clever Energy Boilers

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.

Mr & Mrs Sheen, Doncaster

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. 

Mr Peacock, Holmfirth

I am very happy with the service I received. My new boiler has been installed very quickly and hassle free, I would definitely recommend this service.

Moyra Thomas, Stockport

Rizwan was a very good engineer he was very clean and made the place spotless after he had gone.

Mary Jones, Birmingham

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.

Adrian Charlton, West Yorkshire

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.

Mr Herbert, Yorkshire