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Ariston CLAS ONE 30 boiler

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Plumbproud rating

81.21%

Ariston CLAS ONE 30 Combi Gas boiler

We have determined a rating of 81.21% for this Ariston CLAS ONE 30 Combi boiler on the PlumbProud quality scoring system. The rating is determined using a variety of important factors including price installed, manufacturer guarantees, energy efficiency and the likely cost of running.

You should budget approximately £1,900 for the supply and installation of this Ariston CLAS ONE 30 Combi boiler on a standard, non-complicated fit.

If you would like to get in touch with us for a free quote and professional guidance and advice on whether the Ariston CLAS ONE 30 is the right choice for your home, you can do so by entering your postcode in the quote boxes on this page, calling us on 01604 343053 or you can click here to email us.


Installed price around

£1,900

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Ariston CLAS ONE 30 Combi Gas boiler frequently asked questions

What type of boiler is the Ariston CLAS ONE 30?

The Ariston CLAS ONE 30 boiler could be suitable for your house or flat if you are looking for a new combi boiler.

Traditional boilers would require you to install one or more storage tanks in your property. These tanks either kept the water warm or stored it for later heating. Manufacturers initially designed and introduced combi boilers to the market to offer homeowners the highest levels of warmth and unlimited hot water without taking up as much space.

Combi boilers provide hot water on demand for your radiators and taps. They take water directly from the mains, heat it immediately as it's needed, and then distribute the hot water around your home.

Combi boilers, however, are limited in terms of how much water they can heat at any given time. For example, if one person wishes to take a shower while another wants to turn on a hot water tap, the amount of water reaching each point drops. This results in a drop in the water pressure as well as the temperature.

Is a Ariston CLAS ONE 30 combi boiler appropriate for my house or apartment?

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 ONE 30 combi is 28 kW, so which types of property would this Ariston CLAS ONE 30 Combi boiler be an appropriate choice for?

A PlumbProud boiler engineer would almost certainly recommend that this Ariston CLAS ONE 30 Combi boiler is most suitable for medium-sized homes and larger apartments with 10-15 radiators and 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 Ariston CLAS ONE 30 Combi boiler's flow rate is 15 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 the Ariston CLAS ONE 30 boiler?

The Ariston CLAS ONE 30 measures TBC mm high and TBC mm wide by a depth of TBC mm.

Is the Ariston CLAS ONE 30 non-condensing or condensing?

The Ariston CLAS ONE 30 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 Ariston CLAS ONE 30 combi boiler good for the environment?

Many homeowners are now worried about climate change and the damage they do to the environment from heating their homes has become a subject of increasing concern.

Gas boilers are responsible for dangerous atmospheric levels of nitrogen dioxide emissions in Britain's biggest cities and, overall, 14% of the UK’s greenhouse gases are produced by our domestic central heating systems.

Do the figures suggest that installing the Ariston CLAS ONE 30 combi at your property would help in the fight against climate change?

Boilers manufactured in the UK must be tested and, by law, achieve an energy efficiency rating of 92% or above, equivalent to a SEDBUK "A" grade. Most boilers achieve an "A" rating meaning they are at least 88% efficient.

The energy efficiency of a boiler indicates the amount of energy it uses (and wastes) during operation.

The Ariston CLAS ONE 30 has been assigned an efficiency rating of 90% with a SEDBUK rating of "A".

The ERP (or Energy Related Products Directive) is European legislation which applies to all products that consume energy throughout their lifetime.

Its purpose is to encourage manufacturers to offer products that are kinder to the environment by reducing harmful gas emissions at all stages, from production and end use right through to disposal.

The ERP rating for the Ariston CLAS ONE 30 is "A" for heat and "A" for water.

Does a Ariston CLAS ONE 30 combi boiler come with a warranty period?

On the Ariston CLAS ONE 30, the manufacturer offers a parts and labour warranty of 8 years.


Ariston CLAS ONE 30 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating90%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW28 kW
MountingWall
Flow rate15 L/m
ERP HeatA
ERP WaterA

The top 10 rated Gas Combi boilers

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

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%

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Ariston CLAS ONE 30 Combi Gas boiler

  1. Home
  2. Ariston CLAS ONE 30
Plumbproud rating for this boiler
81.21%

We score each boiler we sell by considering a number of different factors including price installed, manufacturer guarantees, energy efficiency, the likely cost of running, and more. For this Ariston CLAS ONE 30 Combi boiler, we have awarded a rating of 81.21%.

You should budget approximately £1,900 for the supply and installation of this Ariston CLAS ONE 30 Combi boiler on a standard, non-complicated fit.

Enter your postcode in the box provided and receive a free quote for the Ariston CLAS ONE 30 boiler for your home. We are also happy to answer any questions you might have about any of our boilers. You can do this by emailing the team or calling us today on 01604 343053.


Installed price guideline
£1,900

Get your free quote

Ariston CLAS ONE 30 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating90%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW28 kW
MountingWall
Flow rate15 L/m
ERP HeatA
ERP WaterA

Ariston CLAS ONE 30 Combi Gas boiler frequently asked questions

Is the Ariston CLAS ONE 30 a combi, system or regular boiler?

If you are searching for a combi boiler for your house or flat, the Ariston CLAS ONE 30 is certainly one to consider.

Traditional boilers need one or more large tanks to work - one to heat and keep water warm for immediate use and the other to store water intended for heating later. Finding space for these large tanks is difficult in British residential property - remember that our houses and flats are among the smallest in the world. This is the problem that combi boilers were designed to solve when they were introduced in the 1970s.

Combi boilers don't need a tank - instead, they instantly heat water drawn from the mains using technology inside the boiler. This hot water is then distributed immediately to your taps or radiators on demand.

The biggest disadvantage to combi boilers is that they have a maximum capacity for heating water, meaning that they work best when only one point within a household wants hot water. For example, if someone is taking a shower and another person uses a hot water tap at the same time, the water pressure, volume and temperature to both points drops.

Is a Ariston CLAS ONE 30 combi boiler suitable for my house or flat?

Whether this Ariston CLAS ONE 30 Combi boiler is right for where you live 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 of a boiler is measured in kilowatts and indicates how much energy it can use to heat the water needed for your radiators, taps and showers. The greater the output, the more water it can heat.

A boiler whose output is too high will give you hot water and warm radiators but also higher gas bills, whereas a boiler whose output is too low will result in cheaper gas bills but the water might not always be as hot as you want it to be.

The output of the Ariston CLAS ONE 30 combi is 28 kW, so which types of property would this model be appropriate for?

An experienced Gas Safe boiler installer would recommend that the Ariston CLAS ONE 30 combi boiler would be an ideal installation option for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

When choosing a combi boiler like the Ariston CLAS ONE 30, you need to consider the "flow rate" as well as the output rate. Flow rates (measured in litres per minute) indicate the volume of hot water that the boiler can heat up and then distribute to your taps and radiators.

However, combi boilers draw water from the mains and this means they can only heat the amount of water that actually enters your property.

What this means is that, if your mains pressure is 12 litres per minute, that is your boiler's effective flow rate even if it has the capacity to process 18 litres per minute. This Ariston CLAS ONE 30 Combi boiler's flow rate is 15 L/m.

To give you an idea of the flow rate you might need, a power shower typically requires around 12 litres of water per minute and a basin tap requires 4-8 litres per minute.

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.


The dimensions of the Ariston CLAS ONE 30 are

The Ariston CLAS ONE 30's dimensions are TBC mm [H] x TBC mm [W] x TBC mm [D].

Is the Ariston CLAS ONE 30 non-condensing or condensing?

The Ariston CLAS ONE 30 boiler is a condensing gas boiler and we recommend that you select one of the latest models if possible.

Condensing boilers reduce homeowners' gas bills and are better for the environment. They do this by capturing and recycling the heat still present in the flue exhaust gases and water vapour condensation produced when boilers burn gas to generate the power they need to operate.

How energy efficient is the Ariston CLAS ONE 30 combi?

How we heat our homes and the effect that has on climate change has become important to many homeowners worried about the environment.

Dangerous levels of nitrogen dioxide emissions in larger UK cities are caused by gas boilers in domestic properties, and 14% of the UK’s greenhouse gas production is as a result of central heating.

Would installing a Ariston CLAS ONE 30 combi boiler in your home be a green choice? Let's look at the numbers.

All boilers manufactured after April 2018 in the UK must be rated as an “A” on the SEDBUK grading system, subject to a minimum energy efficiency rating of 92% or above. Before that, the minimum rate was 88% - boilers with an energy efficiency of 88% or 89% were given a “B” rating. Boilers scoring 90% or more were given an "A" rating.

The energy efficiency rating for a boiler describes the amount of energy it uses and how much goes to waste in operation.

The Ariston CLAS ONE 30 has an efficiency rating of 90% with a SEDBUK grade of "A".

In 2015, the Energy Related Products Directive (ERP) came into force. The legislation applies to all products that consume energy in production, during their active life, and at the point of final disposal.

The ERP was introduced to incentivise manufacturers to create products that emitted fewer harmful gases with the larger aim of protecting the wider environment.

The Ariston CLAS ONE 30 has been awarded an ERP rating of "A" for heat and "A" for water.

Am I covered if the Ariston CLAS ONE 30 combi boiler breaks down?

Parts and labour charges incurred during a repair on the Ariston Ariston CLAS ONE 30 boiler are covered by a 8 year warranty.


The top 10 rated Gas Combi boilers

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

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%
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