What kind of boiler is the Worcester Bosch Greenstar I System 27i - standard, combi or system?

If you want a system boiler for your flat or house, the Worcester Bosch Greenstar I System 27i might be an option for you to consider.

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.

Would the Worcester Bosch Greenstar I System 27i system be a suitable boiler for my house or flat?

To determine that, we need to consider the size of the boiler. Size doesn't mean how big the boiler is - it means how big its "output" is.

This Worcester Bosch Greenstar i System 27i System boiler gets its power from gas and the power it's capable of producing is measured in kilowatts - the output rate is actually a kilowatt rate. The higher the output rate, the more kilowatts a boiler can use when heating water.

If you choose a boiler whose output rate is too low, it may not have enough power to make your water as hot as you would like. If you choose a boiler whose output rate is too high, you won't have to put up with lukewarm water but you will face higher gas bills.

The Worcester Bosch Greenstar I System 27i system boiler has an output level of 27 kW, so which types of property would it be appropriate for?

Most heating engineers would recommend that this Worcester Bosch Greenstar i System 27i System boiler would be suitable for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

The size of the Worcester Bosch Greenstar I System 27i in millimetres

The Worcester Bosch Greenstar I System 27i is 690 mm high by 390 mm wide by 280 mm deep.

Greenstar I System 27i – condensing or non-condensing?

We recommend that you select a condensing boiler like the Worcester Bosch Greenstar I System gas Worcester Bosch Greenstar I System 27i for your home if possible because of the environmental benefits and the money you'll save on your gas bills.

Condensing boilers are much more energy-efficient than older, non-condensing models as they capture and recycle the heat still present in the water vapour condensation and flue exhaust gases that your boiler creates when burning gas for reuse.

Does the Worcester Bosch Greenstar I System 27i system protect the environment?

The effects of climate change on the environment are leading many homeowners to question the damage they might be doing by the way they heat their homes.

As much as 14% of the UK’s greenhouse gas production derives from our domestic central heating systems. Gas boilers are responsible for dangerous levels of nitrogen dioxide emissions in Britain's largest cities.

Is the Worcester Bosch Greenstar I System 27i system boiler an environmentally friendly choice for your home? Here’s what the figures say.

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 I System 27i was awarded an efficiency rating of 92% with a SEDBUK band rating of "A".

The Energy Related Products Directive, also known as ERP, is European legislation that intends to reduce energy consumption related to products right from their initial manufacturing process through to eventual final disposal.

The purpose of the directive is to encourage manufacturers to create new products that are kinder to the environment and which result in lower overall harmful gas emissions through a product's entire life cycle.

The Worcester Bosch Greenstar I System 27i has a rating of "A".

Is this Worcester Bosch Greenstar I System 27i system covered by a warranty?

The manufacturer offers a parts and labour warranty of 7 years on the Worcester Bosch Greenstar I System 27i boiler to new customers.