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Worcester Bosch Greenstar I System 21i boiler

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Plumbproud rating

90.84%

Worcester Bosch Greenstar i System 21i System Gas boiler

We score this Worcester Bosch Greenstar i System 21i System boiler as 90.84% on the PlumbProud quality scoring system. Our rating is based on various factors, including the installation price, the length of the manufacturer's warranty, and the expected energy efficiency and operating costs.

We would anticipate that this Worcester Bosch Greenstar i System 21i System boiler would cost you £2,200 fully installed through PlumbProud provided that the fitting is standard and with no complications.

To contact us, please enter your postcode in the quote boxes on this page, click here to email us, or give us a call on 01604 343053. We can provide you with a free quote on the Worcester Bosch Greenstar I System 21i boiler and offer professional advice and guidance on whether this Worcester Bosch Greenstar i System 21i System boiler is the right choice for your home.


Installed price around

£2,200

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Worcester Bosch Greenstar i System 21i System Gas boiler frequently asked questions

Which category of boiler does the Worcester Bosch Greenstar I System 21i fit into?

If you want a system boiler for your flat or house, the Worcester Bosch Greenstar I System 21i might be an option for you to consider.

This type of boiler is better for larger homes and larger families where the demand for water is likely to be higher.

System boilers use a cylinder that draws water from the mains, heats it and then keeps it warm. The cylinder stores a large amount of water, meaning that you should have hot water all day. To be certain of this, make sure that you program your boiler to draw and heat water to meet times when demand is greater, like first thing in the morning before you and your family members go to work or school, and for the evening when everyone gets home.

Unlike heat only boilers, you won't need to find room in your attic for a cold water storage tank - suitable if you don't have an attic, your attic space is very limited, or you are planning an attic conversion in the near future.

Should I install a Worcester Bosch Greenstar I System 21i system boiler in my house or apartment?

Whether this Worcester Bosch Greenstar i System 21i System boiler is right for your property depends on its size or what its "output" level is. Size does not mean its physical dimensions, however - it means how powerful it is.

The output rating indicates how much energy a boiler can use in providing you with hot water and heat when you need it from your radiators and taps. The greater the output, the more water it can heat.

It's better to take advice on this from a registered installer because, if your boiler output is too low, your water and radiators might not get as hot as you would like them to be. However, if the output level is too high, you'll end up paying more on your gas bills than you need to.

Which types of property would this Worcester Bosch Greenstar i System 21i System boiler be appropriate for given its output of 21 kW?

An experienced boiler engineer would recommend that this Worcester Bosch Greenstar i System 21i System boiler would provide adequate heating and hot water for medium-sized homes and larger apartments with up to 10-15 radiators and two bathrooms.


Worcester Bosch Greenstar I System 21i - size in millimetres

The Worcester Bosch Greenstar I System 21i is 710 mm in height, 400 mm in width and 330 mm in depth.

Is the Worcester Bosch Greenstar I System 21i condensing or non-condensing?

The Worcester Bosch Greenstar I System 21i is a condensing boiler – we recommend to all clients that they choose the very latest condensing boilers because their efficiency continues to improve year after year.

Condensing boilers recycle heat from both water vapour condensation and flue exhaust gases via a secondary heat exchanger. With this heat, it performs other tasks like warming up colder water returning from your radiator without having to use more gas.

You will save money on your gas bills every year by choosing a condensing boiler as well as benefitting the environment.

Is the Worcester Bosch Greenstar I System 21i system rated as environmentally friendly?

With more and more of us concerned about environmental issues and climate change, how we heat our homes has become an important issue to many homeowners.

The heating of our homes accounts for 14% of the UK's greenhouse gas emissions. Especially in the big cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Would choosing a Worcester Bosch Greenstar I System 21i system help the environment? Let’s see what the performance figures suggest.

Every boiler manufactured and supplied in the UK must have an energy efficiency rating of 92% (SEDBUK “A” rating). These minimums were made law in April 2018 - before that, the minimum energy efficiency rating was 88% (88%/89% = "B" SEDBUK grade, 90%+ = "A" SEDBUK grade).

The Worcester Bosch Greenstar I System 21i was awarded an efficiency rating of 94% and a band rating of "A".

Energy efficiency ratings for boilers describe the amount of energy they use and waste when switched on and working.

The ERP (Energy Related Products Directive) is European legislation that aims to reduce the use of energy at all points during a product's life, from the point of manufacture to when it's in active use right through to final disposal.

The regulation aims to encourage manufacturers to create products that are more environmentally friendly and which reduce gas emissions associated with those products.

The ERP grading for the Worcester Bosch Greenstar I System 21i is "A".

What is the warranty period on a Worcester Bosch Greenstar I System 21i system boiler?

The parts and labour warranty offered with this Worcester Bosch Greenstar i System 21i System boiler covers you for 7 years.


Worcester Bosch Greenstar i System 21i Gas System boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty7 Years
Output in kW21 kW
Height710 mm
Width400 mm
Depth330 mm
MountingWall
ERP HeatA

The top 10 rated Gas System boilers

Using the Plumbproud scoring system, the current 10 ten Gas System boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 61295.72%
2Vaillant ecoTEC Plus 61595.20%
3Vaillant ecoTEC Plus 61894.37%
4Vaillant ecoTEC Plus 62493.33%
5Worcester Bosch Greenstar i System 9i92.89%
6Vaillant ecoTEC Plus 63092.75%
7Worcester Bosch Greenstar 4000 12kW92.50%
8Vaillant ecoTEC Exclusive IQ 62792.42%
9Vaillant ecoFIT Pure 61292.38%
10Vaillant ecoFIT Pure 61592.36%

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Worcester Bosch Greenstar i System 21i System Gas boiler

  1. Home
  2. Worcester Bosch Greenstar i System 21i
Plumbproud rating for this boiler
90.84%

On the PlumbProud quality scoring system, we rate this Worcester Bosch Greenstar i System 21i System boiler 90.84%. To determine our rating, we take lots of different factors into consideration from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

You should budget around £2,200 for the supply and installation of this Worcester Bosch Greenstar i System 21i System boiler by PlumbProud.

To receive a free quote on the Worcester Bosch Greenstar I System 21i and to get professional guidance and advice on whether this Worcester Bosch Greenstar i System 21i System boiler is the right choice for your home, please call us on 01604 343053, enter your postcode in the quote boxes on this page, or click here to email us.


Installed price guideline
£2,200

Get your free quote

Worcester Bosch Greenstar i System 21i Gas System boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty7 Years
Output in kW21 kW
Height710 mm
Width400 mm
Depth330 mm
MountingWall
ERP HeatA

Worcester Bosch Greenstar i System 21i System Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar I System 21i a standard, combi or system boiler?

The Worcester Bosch Greenstar I System 21i is a system boiler you may wish to consider if you want this type of boiler for your house or flat.

A system boiler needs a hot water cylinder to work but it does not require a cold water tank, unlike with heat only boilers. This makes system boilers suitable for properties that lack loft space (or have no loft at all) or where a loft conversion is planned. The cylinder stores hot water for use throughout the day and water can be distributed to more than one tap or shower simultaneously without a loss of pressure or temperature (something combi boilers really struggle with).

System boilers are generally found in larger homes or properties housing large families. System boilers are easier to install than heat only boilers because their major components, including the circulation pump, are built-in and, of course, no cold water tank is needed.

With a system boiler, you use the control panel to set times for when you want the heating and hot water to be available but, unlike combi boilers, they cannot deliver hot water instantly. If you don't set your timer, you will have to wait for the water to heat up.

Is a Worcester Bosch Greenstar I System 21i system boiler suitable for my house or apartment?

It's best to choose a boiler whose size or "output" is right for your property. With boilers, however, size does not mean how big a boiler is, it means how much power it has.

The output of a boiler is measured in kilowatts and tells you how much power it has available to heat the water it sends to your hot taps, showers and radiators. The greater the demand for hot water in your home, the larger the output you will need.

It is important to select a boiler with the optimal output rate. Choose one with too high an output and your gas bills will be too expensive. Choose one with too low an output and sometimes the water in your radiators and coming out of your taps will be barely lukewarm.

The output of the Worcester Bosch Greenstar I System 21i system is 21 kW kilowatts, so which types of property would this be most suitable for?

An experienced heating engineer would recommend that the Worcester Bosch Greenstar I System 21i system boiler is a suitable choice for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.


What size is the Worcester Bosch Greenstar I System 21i boiler?

The measurements of the Worcester Bosch Greenstar I System 21i are 710 mm by 400 mm by 330 mm.

Is the Worcester Bosch Greenstar I System 21i a condensing or non-condensing boiler?

We recommend that, if possible, you choose a condensing boiler like the Worcester Bosch Greenstar I System 21i.

Condensing boilers are more energy-efficient. They achieve this efficiency by capturing the heat present in flue exhaust gases and water vapour condensation and recycling that heat to, for example, warm colder water coming back from your radiators.

By choosing the latest condensing boiler, you'll also notice a significant reduction in your gas bills, particularly if you're replacing a boiler more than 15 years old.

Is the Worcester Bosch Greenstar I System 21i system boiler environmentally friendly?

How we heat our homes has become a pressing issue of concern for many homeowners worried about climate change and the environmental impact of their personal choices.

With central heating being responsible for 14% of greenhouse gas emissions in the UK, your choice of boiler matters. Gas boilers are also responsible for the significant atmospheric volumes of dangerous nitrogen dioxide emissions in larger British cities.

Will choosing to install a Worcester Bosch Greenstar I System 21i system in your home help the environment? Let's review the figures.

All boilers manufactured and supplied in the UK are assigned two energy efficiency ratings. By law, they must achieve a SEDBUK "A" rating subject to a minimum efficiency level of 92%. Prior to that, the minimum was 88% (88% and 89% are equivalent to a SEDBUK "B" grade and 90% and above an "A" grade).

The ratings awarded to the Worcester Bosch Greenstar I System 21i are 94% with a SEDBUK rating of "A".

The Energy Related Products Directive (ERP) was introduced in 2015 and applies to all products that consume energy throughout their lifetime, including during the manufacturing process and at the point of final disposal.

The purpose of the ERP is to ensure that companies create products that are kinder to the environment by reducing both the energy they use and the harmful emissions they produce.

The Worcester Bosch Greenstar I System 21i has an ERP rating of "A".

What warranty do I get if I purchase the Worcester Bosch Greenstar I System 21i boiler?

The Worcester Bosch Greenstar I System 21i boiler is provided with a parts and labour warranty lasting 7 years.


The top 10 rated Gas System boilers

Using the Plumbproud scoring system, the current 10 ten Gas System boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 61295.72%
2Vaillant ecoTEC Plus 61595.20%
3Vaillant ecoTEC Plus 61894.37%
4Vaillant ecoTEC Plus 62493.33%
5Worcester Bosch Greenstar i System 9i92.89%
6Vaillant ecoTEC Plus 63092.75%
7Worcester Bosch Greenstar 4000 12kW92.50%
8Vaillant ecoTEC Exclusive IQ 62792.42%
9Vaillant ecoFIT Pure 61292.38%
10Vaillant ecoFIT Pure 61592.36%
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