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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 rated this Ariston CLAS ONE 30 Combi boiler at 81.21% using the PlumbProud quality scoring system. To determine a rating, we weigh up a number of important considerations including the energy efficiency, estimated running costs, manufacturer's warranty, price of the boiler and more.

Provided the proposed installation is straightforward, we would anticipate that this Ariston CLAS ONE 30 Combi boiler will cost £1,900 fully installed through PlumbProud.

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 around

£1,900

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Ariston CLAS ONE 30 Combi Gas boiler frequently asked questions

Which category of boiler does the Ariston CLAS ONE 30 fit into?

When looking for a combi boiler for your house or flat, the Ariston CLAS ONE 30 might be a suitable option for you.

Boilers traditionally required the installation of one or more large tanks around your property. These were filled with water that was either being heated or was to be heated later. British homes are among the smallest in the world so, to solve the space problem, manufacturers introduced combi boilers in the 1970s to offer homeowners the warmth and hot water supply they needed while taking up much less space.

A combi boiler is designed to heat both radiators and taps on demand and at the same time. Water from the mains passes through a combi boiler and the boiler's technology instantly turns it into hot water. Your boiler then distributes the hot water throughout your home.

The main disadvantage of combi boilers is that they have a maximum water volume capacity. What this means is that, if one person is using the shower while another uses a hot tap simultaneously, less water gets to each area, resulting in a fall in water pressure at both points.

Is the Ariston CLAS ONE 30 combi boiler suitable for my house or apartment?

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

The amount of hot water you get from showers, bathrooms, and sinks and heat from your radiators depends on your boiler's output (measured in kilowatts). The higher the level of output, the better your home will be heated and you can be more certain that the water from your taps will be as hot as you want.

However, you must be careful. You might not get the hot water you want if your boiler output is too low. If it's too high, you'll be paying more than you need to for gas.

With the Ariston CLAS ONE 30 combi's output at 28 kW, which types of property would this Ariston CLAS ONE 30 Combi boiler be most appropriate for?

An experienced boiler engineer would recommend that this Ariston CLAS ONE 30 Combi boiler would provide adequate heating and hot water for medium-sized homes and larger apartments with up to 10-15 radiators and two bathrooms.

When choosing a combi boiler for your home, you need to think about "flow rates" as well as output rates. This Ariston CLAS ONE 30 Combi boiler's flow rate is 15 L/m.

This indicates the maximum volume of hot water (measured in litres per minute) that your boiler can heat then distribute to your taps, showers and radiators at any one time. The greater the demand for hot water in your home, the higher the flow rate you will require.

However, all combi boilers like the Ariston CLAS ONE 30 draw water directly from the mains and heat it instantly.

This means that they can only heat and distribute water at the rate it enters the property (the "mains pressure" rate). For example, if your mains pressure is 11 litres per minute, this will be the highest flow rate you can achieve even if your boiler's flow rate is 17l/m.

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.


Making space for the Ariston CLAS ONE 30

The measurements of the Ariston CLAS ONE 30 are TBC mm by TBC mm by TBC mm.

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

Condensing gas boilers like the Ariston CLAS ONE 30 are more energy-efficient and choosing one for your home will cut the amount you pay every year for your gas.

They do this by capturing the heat in water vapour condensation and in exhaust gases which would normally be expelled via the flue. They then recycle that heat, returning it to the system to, among other tasks, reheat colder water that is returning to your boiler from your radiators.

Is the Ariston CLAS ONE 30 combi considered environmentally friendly?

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

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 the Ariston CLAS ONE 30 combi help the environment? Let's see what the statistics suggest.

The energy efficiency rating of the Ariston CLAS ONE 30 is 90% 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) was introduced in 2015 and it 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 Ariston CLAS ONE 30 has an ERP rating of "A" for heat and "A" for hot water production.

Is this Ariston CLAS ONE 30 combi covered by a warranty?

The Ariston CLAS ONE 30 boiler 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 boiler

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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 scored this Ariston CLAS ONE 30 Combi boiler at 81.21% on our internal benchmarking system. To determine a score, we take into consideration a number of different factors including the boiler's energy efficiency, installed price, likely running costs, and the length of the manufacturer's warranty.

Provided the proposed installation is straightforward, we would anticipate that this Ariston CLAS ONE 30 Combi boiler will cost £1,900 fully installed through PlumbProud.

To receive a free quote on the Ariston CLAS ONE 30 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 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

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

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

Combi boilers were introduced by manufacturers in the 1970s to offer British homeowners a way to cheaply and reliably heat their homes and have hot water without taking up too much space. Previously, most boilers had one or more storage tanks, which either heated water and kept it warm or held water to be heated later.

With combi boilers, there is no need to find space for large tanks around your home as the hot water needed for your radiators and taps is available on demand. Combi boilers do this by drawing water from your mains supply, heating it instantly whenever you need it and then distributing it to where it's needed in the home.

The major disadvantage to combi boilers is that they have a maximum capacity for heating water. In a larger household, water pressure, volume and temperature will drop if two or more people are trying to use hot water at the same time.

Should I install a Ariston CLAS ONE 30 combi boiler in my house or flat?

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.

A boiler’s output indicates the amount of power it can use when heating the water which it then sends to your taps and radiators. The higher the output rate, the more water it can heat.

If a boiler’s output is too low, there will be times when your hot water might not be as hot as you want it to be. If it is too high, you’ll likely be paying more than you need to for your gas.

Measured in kilowatts, the Ariston CLAS ONE 30 combi's output level is 28 kW, so which types of property would this Ariston CLAS ONE 30 Combi boiler be an appropriate choice for?

An experienced PlumbProud Gas Safe boiler installer would recommend that this Ariston CLAS ONE 30 Combi boiler is appropriate for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

With combi boilers, you need to consider the flow rate as well as the output rate. The flow rate (shown in litres per minute) measures how much water your boiler can draw from the mains which it then instantly heats and distributes to your taps and radiators.

However, a high flow rate is of little to no value if your local water pressure is low. If your local mains water pressure is 10l/m and your flow rate is 12l/m, your boiler will only be able to process 10l/m.

If you live in an area with high water pressure but your household has multiple bathrooms and/or radiators and many members of your household want to use hot water at the same time (like morning or evening baths or showers), it's unlikely that you'll be able to find a combi with a high enough flow rate.

As an indication, a power shower needs about 10 litres of water per minute, whereas the flow rate of this Ariston CLAS ONE 30 Combi boiler is 15 L/ml/m.

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.


Where will the Ariston CLAS ONE 30 fit in my house?

The Ariston CLAS ONE 30 is TBC mm [H] by TBC mm [W] by TBC mm [D] in size.

Ariston CLAS ONE 30 – non-condensing or condensing?

Condensing boilers like the Ariston CLAS ONE 30 improve energy efficiency and reduce your annual expenditure on gas.

They do this by capturing and recycling the warmth still present in water vapour condensation and flue exhaust gases to, for example, increase the temperature of the colder water returning from your radiators.

Condensing boilers are also much better for the environment because they emit fewer greenhouse gases.

Is the Ariston CLAS ONE 30 combi boiler environmentally friendly?

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

About 14% of the greenhouse gases we produce in the UK come from the power needed for central heating. In bigger British cities, gas boilers are a significant source of nitrogen dioxide emissions.

Would installing the Ariston CLAS ONE 30 combi in your home be an environmentally friendly decision? Let's look closely at the figures.

All boilers manufactured in the UK from April 2018 must operate at a minimum level of energy efficiency of 92% ("A" rating on the SEDBUK scale). Before that, the minimum was 88% - boilers scoring 88/89% were given a SEDBUK "B" rating and 90% or above an "A" rating.

The energy efficiency score of a boiler indicates how much energy it uses and how much goes to waste when in use.

After its assessment, the Ariston CLAS ONE 30 was given an efficiency rating of 90% and a SEDBUK grading of "A".

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

The aim is to encourage companies to create environmentally friendlier products that reduce harmful gas emissions during manufacturing and when in use by the end client, right through to their eventual disposal.

In the case of the Ariston CLAS ONE 30, the ERP rating is "A" for heat and "A" for hot water production.

What length of warranty does the Ariston CLAS ONE 30 come with?

The Ariston CLAS ONE 30 boiler comes with a 8 year warranty for parts and labour.


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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