Is the Worcester Bosch Greenstar I System 15i a regular, combi or system boiler?

Worcester Bosch’s Greenstar I System 15i is one you might consider if you’re looking for a system boiler for your house or flat.

System boilers, like regular boilers, require a hot water cylinder (usually placed in a landing or airing cupboard) to work but they don’t require a separate cold water tank. This makes installation quicker and easier and, for homeowners with little loft space or who are considering a loft conversion, they're a more suitable choice.

System boilers don't need separate water tanks because they contain built-in circulating pumps that perform the same task. Just like heat only boilers, they require you to program in the times when you want heating and hot water to be available - they don't offer instant hot water like combi boilers. The cylinders keep whatever water they contain warm, although, if there is no hot water in the tank, you will have to wait up to an hour before hot water will come through your taps.

Should I install a Worcester Bosch Greenstar I System 15i system boiler in my house or apartment?

You should make sure that the boiler you install in your property is the right "size". And size doesn't mean its physical dimensions, size means how much power it has - the "output".

Your boiler should be able to cope with peak hot water demand in your property and not just your average hot water usage. The output rate of a boiler is measured in kilowatts and tells you how much power a boiler can use to provide hot water to your taps, showers and radiators.

If the output of your boiler is too low, there will often be times when your water isn't as hot as you want. But if your boiler output is too high, it will be more costly to run (often unnecessarily).

The output of the Worcester Bosch Greenstar I System 15i system boiler is 15 kW kilowatts. Which types of property would this be appropriate for?

An experienced PlumbProud boiler engineer would likely recommend this Worcester Bosch Greenstar i System 15i System boiler as suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

Dimensions of the Worcester Bosch Greenstar I System 15i boiler

The size of the Worcester Bosch Greenstar I System 15i boiler is 710 mm tall, 400 mm wide, and 330 mm deep.

Is the Worcester Bosch Greenstar I System 15i non-condensing or condensing?

We always recommend to clients that they select the very latest condensing boiler for their home.

Condensing boilers like the Worcester Bosch Greenstar I System 15i are more efficient with the gas they use in operation, meaning that you'll benefit from lower fuel bills. Condensing boilers are also better for the environment.

They achieve their efficiency by capturing and recycling the heat still present in the water vapour condensation and flue exhaust gases created when a boiler burns gas to get the energy it needs. It then reuses that recycled heat to perform a number of tasks, including heating the colder water that comes back to your boiler via the radiator.

Does the Worcester Bosch Greenstar I System 15i system protect the environment?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

Central heating creates 14% of the UK’s greenhouse gases. And in Britain's larger cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Will you be helping the environment if you decide to install a Worcester Bosch Greenstar I System 15i system in your home? Let’s look at the figures.

The energy efficiency rating of the Worcester Bosch Greenstar I System 15i is 94% with a SEDBUK band rating of "A".

Energy efficiency tests record how much energy is wasted on non-core functions during an operation.

By law, all boilers manufactured and supplied in the UK must have a minimum energy efficiency performance level of 92% (equivalent to a SEDBUK "A" grade). Up to April 2018, the minimum performance level was 88% (88% and 89% are equivalent to a SEDBUK "B" grade and 90%+ an "A" grade).

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 I System 15i is "A".

Does the Worcester Bosch Greenstar I System 15i system boiler come with a warranty?

The Worcester Bosch Greenstar I System 15i boiler comes with a 7 year warranty for parts and labour.