Is the Worcester Bosch Greenstar Heatslave II 25/32 a system boiler, a combi boiler or a regular boiler?

If you’re looking for a combi boiler for your house or flat, then the Worcester Bosch Greenstar Heatslave II 25/32 is one you may wish to consider.

In many properties, combi boilers are more suitable than traditional types of boiler. Combi boilers heat water instantly on demand, which they draw directly from the mains supply, removing the need for storage tanks that can take up valuable space in your home.

A combi boiler is often the right choice for a smaller property, particularly if your home doesn't have a useable loft. As water is heated and delivered immediately rather than being kept warm for hours in an immersion tank, combi boilers reduce oil usage, thereby minimising your heating costs.

The main disadvantage of combi boilers is that they can only heat a certain amount of water at any one time. This means that, if two people are using different taps or showers within your home at the same time, the flow of heated water to each will be reduced, as will the water pressure and temperature.

Is the Worcester Bosch Greenstar Heatslave II 25/32 combi boiler from the Greenstar Heatslave II range a suitable choice for my house or flat?

Selecting the right boiler for your property means selecting a boiler that is the right "size". And, by size, we don't mean how big it is, we mean how powerful it is - its "output".

The output rate tells you how much energy your boiler has to use to provide you and your family with hot water and central heating. A higher output rate means that it can heat greater volumes of water.

Please be aware, though - if you choose a boiler whose output is too low, the water in your radiators and coming from your taps may not be warm enough. Conversely, if you choose a boiler with too high an output, you'll pay more for oil than is necessary.

The Worcester Bosch Greenstar Heatslave II 25/32 combi boiler has an output level of 32 kW, so which types of property would it be appropriate for?

An experienced PlumbProud heating engineer would recommend that the most suitable type of property for a Worcester Bosch Greenstar Heatslave II 25/32 combi would be medium-sized homes and larger apartments containing 10-15 radiators and providing hot water for two bathrooms.

Homeowners considering fitting a combi boiler to their home need to consider flow rates as well as output rates.

The flow rate is a measurement of the volume of water a combi can instantly heat and send to the taps and radiators around your home. The higher the likely demand for hot water in your home, the higher your combi's flow rate should be. This Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler's flow rate is 22 L/m.

Unlike heat only or system boilers, combi boilers don't store hot water in a tank for later use - instead, they draw it directly from the mains. This means that the volume of water your boiler can actually process is constrained by the flow rate of water in the mains pipe.

So, if you choose a combi boiler with a 15l/m flow rate but the flow rate in your mains pipe is 12l/m, the combi boiler's working flow rate is also 12l/m.

Combi boilers are also not always the correct choice for homes with multiple bathrooms, a high number of radiators, or where more than one family member will want to use hot water at the same time.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.

What size is a Worcester Bosch Greenstar Heatslave II 25/32 boiler?

The Worcester Bosch Greenstar Heatslave II 25/32 is 855 mm in height, 520 mm in width and 600 mm in depth.

Many homeowners dislike the floor-standing boilers (like the Worcester Bosch Greenstar Heatslave II 25/32) they have in their properties because they feel that they are bulky and take up too much room. If this is you and you want to replace what you have now with a compact, wall-mounted boiler, we can do this for you, although please note that you may need to pay for new piping.

The oil bill savings offered by modern boilers are significant, however, and you should be able to recoup your investment in a few years.

You will need to have your hot water cylinder and/or expansion tank removed if you’re considering replacing your existing heat only or system boiler with the Worcester Bosch Greenstar Heatslave II 25/32.

Please get in contact with PlumbProud for information and guidance on helping you make the right decision for you.

Is the Worcester Bosch Greenstar Heatslave II 25/32 condensing or non-condensing?

The Worcester Bosch Greenstar Heatslave II 25/32 is a condensing oil boiler - this is the type of boiler we recommend to most clients because they're better for the environment and they will save money on annual fuel bills.

A condensing boiler captures and recycles the warmth still present in both the flue exhaust gases and water vapour condensation created when oil is burned to provide your boiler with power.

This means it needs less oil to operate and it uses this extra energy to perform a number of tasks, including heating the colder water that comes back to the boiler from the radiators in your home.

Is the Worcester Bosch Greenstar Heatslave II 25/32 combi a good choice for the environment?

Environmentally-friendly heating has become an important issue for homeowners concerned about the accelerating pace of climate change.

In the UK, central heating systems account for 14% of greenhouse gas production. Gas boilers in particular are responsible for emissions of dangerous nitrogen dioxide in British cities.

Would installing the Worcester Bosch Greenstar Heatslave II 25/32 combi in your home be an environmentally friendly decision? Let's look closely at the figures.

Boilers manufactured and installed in the UK are assigned energy efficiency ratings following testing to an agreed set of standards. These scores indicate how much energy the boiler uses and how much goes to waste when it's in operation.

By law, boilers must achieve a SEDBUK rating of "A" subject to achieving a minimum of 92% energy efficiency. Prior to April 2018, the minimum was 88% (88% and 89% on the SEDBUK are graded "B" and 90% and above is graded "A").

The Worcester Bosch Greenstar Heatslave II 25/32 was awarded an efficiency rating of 91% with a SEDBUK band rating of "A".

The Energy Related Products Directive (ERP) intends to reduce the amount of energy consumed by individual products over their entire lifetime, from the initial manufacturing process to final disposal and at all points in between.

The legislation is designed to encourage manufacturers to create products that are more environmentally friendly and which result in a reduction in harmful gas emissions.

The ERP rating for the Worcester Bosch Greenstar Heatslave II 25/32 is "A" for heat and "B" for hot water production.

What is the warranty period on a Worcester Bosch Greenstar Heatslave II 25/32 combi boiler?

The parts and labour warranty on the Worcester Bosch Greenstar Heatslave II 25/32 covers all repair-related costs for 2 years while the heat exchange warranty covers you for [Heat Exchange Warranty] years.