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Ariston CLAS SYSTEM ONE 18 boiler

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Plumbproud rating

81.21%

Ariston CLAS SYSTEM ONE 18 System Gas boiler

Considering lots of different factors such as price installed, manufacturer guarantees, energy efficiency, and the likely running cost, we’ve given this Ariston CLAS SYSTEM ONE 18 System boiler a rating of 81.21% using our PlumbProud quality scoring system.

This Ariston CLAS SYSTEM ONE 18 System boiler is likely to cost around £1,900 fully installed by PlumbProud if there are no unexpected complications during the fit.

To receive a free quote on the Ariston CLAS SYSTEM ONE 18 and to get professional guidance and advice on whether this Ariston CLAS SYSTEM ONE 18 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 around

£1,900

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Ariston CLAS SYSTEM ONE 18 System Gas boiler frequently asked questions

Ariston CLAS SYSTEM ONE 18 - combi, system or regular boiler?

The Ariston CLAS SYSTEM ONE 18 boiler is a system boiler you may wish to consider when looking for a new boiler for your house or flat.

System boilers need a hot water cylinder to work, with the most popular installation location for cylinders being in an airing or landing cupboard. Unlike heat only boilers though, they don't require a separate cold water tank to go in the attic, making them suitable if roof space is at a premium or if you're planning a loft conversion in the future.

System boilers use (often built-in) circulating pumps to distribute hot water to your taps and radiators. Fitting is cheaper and quicker too because you don't need to find room for a water tank. Unlike with a combi boiler, which heats water it draws from the mains instantly, you have to program a system boiler with the times you want hot water and heating.

Is the Ariston CLAS SYSTEM ONE 18 system boiler a suitable option for my house or flat?

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

Boiler output is measured in kilowatts and tells you how much power a boiler can use to heat the water your taps, showers and radiators need. The higher the output, the more power it has.

When choosing a boiler, you should choose one that can cope with the peak demand for hot water in your home and not just your typical usage.

If its output is too low, sometimes your hot water will not be hot enough, but if your boiler's output is too high for your needs, your gas bills will go up and not down.

The output of the Ariston CLAS SYSTEM ONE 18 system is 18 kW, so which types of property would this Ariston CLAS SYSTEM ONE 18 System boiler be an appropriate choice for?

To most experienced Gas Safe engineers, the Ariston CLAS SYSTEM ONE 18 system CLAS SYSTEM ONE would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.


Making space for the Ariston CLAS SYSTEM ONE 18

Ariston’s CLAS SYSTEM ONE 18 is TBC mm tall, TBC mm wide, and TBC mm deep.

Is the Ariston CLAS SYSTEM ONE 18 condensing or non-condensing?

We recommend that, if possible, you choose a condensing boiler like the Ariston CLAS SYSTEM ONE 18.

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 Ariston CLAS SYSTEM ONE 18 system a good choice for the environment?

Many homeowners are becoming increasingly concerned about how they heat their homes and the impact it has on climate change and other important environmental issues.

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 Ariston CLAS SYSTEM ONE 18 system boiler an environmentally friendly choice for your home? Here’s what the figures say.

Under current UK law, all boilers must achieve a minimum energy efficiency level of 92% (a low to good SEDBUK "A" rating). The minimum level was raised from its previous 88% in April 2018.

Energy efficiency scores are intended to inform consumers of the amount of energy used and wasted when a boiler is in normal operation.

The Ariston CLAS SYSTEM ONE 18 was awarded an efficiency rating of 90% with a SEDBUK band rating of "A".

How long is the warranty period on the Ariston CLAS SYSTEM ONE 18 system boiler?

The Ariston CLAS SYSTEM ONE 18 boiler offers a parts and labour warranty of 8 years.


Ariston CLAS SYSTEM ONE 18 Gas System boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating90%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW18 kW
MountingWall

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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The ideal boiler perfect for the largest homes

System boilers

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Ariston CLAS SYSTEM ONE 18 boiler

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Ariston CLAS SYSTEM ONE 18 System Gas boiler

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  2. Ariston CLAS SYSTEM ONE 18
Plumbproud rating for this boiler
81.21%

Using factors such as price installed, manufacturer guarantees, energy efficiency and the likely cost of running, among others, this model has been rated as scoring 81.21% on the PlumbProud boiler benchmarking system.

Provided the proposed installation is straightforward, we would anticipate that this Ariston CLAS SYSTEM ONE 18 System boiler will cost £1,900 fully installed through PlumbProud.

To receive a free quote on the Ariston CLAS SYSTEM ONE 18 boiler, as well as professional advice on whether it will meet the needs of your home, simply enter your postcode in the quote box on this page, click here to email us, or call 01604 343053.


Installed price guideline
£1,900

Get your free quote

Ariston CLAS SYSTEM ONE 18 Gas System boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating90%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW18 kW
MountingWall

Ariston CLAS SYSTEM ONE 18 System Gas boiler frequently asked questions

Ariston CLAS SYSTEM ONE 18 - combi, system or regular boiler?

The Ariston CLAS SYSTEM ONE 18 may be worth considering if you are looking for a system boiler for your house or flat.

System boilers share many similarities with more traditional heat only boilers, like the need to program the times you want them to provide you with heat and hot water - just use the control panel to do this.

Where they differ from regular boilers is that they do not require a separate cold-water tank - everything is done within the hot water cylinder, which contains built-in circulating pumps. This makes them easier to install as there is one less component to fit and makes them more suitable for properties with no loft space, smaller lofts or for homeowners who are considering converting their loft.

As long as you have programmed your system boiler in advance, you will have the hot water you need ready for whenever you want to use it. Once the water is heated, it will remain available, warm, inside the tank until it’s all used up. It will then draw more water from the mains to start heating so that it can provide heat and hot water for the times you've told the system boiler you need it.

Should I choose a Ariston CLAS SYSTEM ONE 18 system boiler for my house or flat?

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

Boiler output is measured in kilowatts and tells you how much power a boiler can use to heat the water your taps, showers and radiators need. The higher the output, the more power it has.

When choosing a boiler, you should choose one that can cope with the peak demand for hot water in your home and not just your typical usage.

If its output is too low, sometimes your hot water will not be hot enough, but if your boiler's output is too high for your needs, your gas bills will go up and not down.

The output of the Ariston CLAS SYSTEM ONE 18 system is 18 kW, so which types of property would this Ariston CLAS SYSTEM ONE 18 System boiler be an appropriate choice for?

An experienced PlumbProud boiler engineer would likely recommend this Ariston CLAS SYSTEM ONE 18 System boiler as suitable for smaller homes and apartments with up to 10 radiators and one bathroom.


Ariston CLAS SYSTEM ONE 18 - size in millimetres

Ariston’s CLAS SYSTEM ONE 18 is TBC mm tall, TBC mm wide, and TBC mm deep.

Ariston CLAS SYSTEM ONE 18 – condensing or non-condensing?

The Ariston CLAS SYSTEM ONE 18 is a condensing gas boiler - we strongly recommend that you choose one of the latest condensing models if possible.

With a condensing boiler, you save money on your gas bills because your boiler captures and recycles the heat present in the flue exhaust gases and water vapour condensation for re-use, meaning they operate far more economically and efficiently.

Is the Ariston CLAS SYSTEM ONE 18 system boiler an environmentally friendly choice?

How we heat our homes is an issue which many homeowners worry about as the world combats climate change and environmental damage.

14% of the total amount of greenhouse gases produced by the UK comes from the central heating systems we use. In some of Britain's biggest cities, gas boilers create dangerous levels of nitrogen dioxide in the atmosphere.

Will choosing a Ariston CLAS SYSTEM ONE 18 system boiler for your home be positive for the environment? Let's examine 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 Ariston CLAS SYSTEM ONE 18 was awarded an efficiency rating of 90% with a SEDBUK band rating of "A".

How long is the warranty period on the Ariston CLAS SYSTEM ONE 18 system boiler?

The Ariston CLAS SYSTEM ONE 18 is covered by a parts and labour warranty of 8 years following installation.


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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