GET A COMPETITIVE QUOTE

Please enter your postcode below to get a free, no obligation, personalised quotation from PlumbProud

Ariston CLAS ONE 38 boiler

  1. Home
  2. Ariston CLAS ONE 38
Plumbproud rating

78.69%

Ariston CLAS ONE 38 Combi Gas boiler

Our PlumbProud quality scoring system considers important factors like energy efficiency, the length of a manufacturer’s guarantee, likely running costs, and installed price to determine a boiler's value for money. This model has received 78.69% from our engineers.

You should budget around £2,200 for the supply and installation of this Ariston CLAS ONE 38 Combi boiler by PlumbProud.

Wondering if the Ariston CLAS ONE 38 is the right boiler for your home? Then speak to a professional here by getting in touch via email or call us on 01604 343053. You can also get a free quote by entering your postcode in the box on the page.


Installed price around

£2,200

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Ariston CLAS ONE 38 Combi Gas boiler frequently asked questions

Is the Ariston CLAS ONE 38 a system, regular or combi boiler?

The Ariston CLAS ONE 38 is worthy of consideration if you're looking for a combi boiler for your flat or house.

Traditionally, most boilers required you to find space in your property for one or more large storage tanks. These tanks would either keep water warm or hold it in reserve for later heating. Manufacturers originally introduced combi boilers to offer homeowners the same level of warmth and hot water without taking up as much space – remember that the UK has some of the smallest homes in the Western world.

With a combi boiler, the hot water needed for your radiators and taps is provided on demand. Water from the mains passes through your combi boiler and the technology within it instantly heats the cold water. It then distributes that hot water around your home.

The biggest drawback for combi boilers is that they have a maximum capacity in volume for heating water. This means that if someone wants to use the shower while another person wants to use a hot water tap, the amount of water reaching each point falls, resulting in a drop in water pressure.

Is the Ariston CLAS ONE 38 combi boiler a suitable choice for my property?

You should make sure that the boiler you install in your property is the right "size". And size doesn't mean its physical dimensions, size means how much power it has - the "output".

Output measures in kilowatts how much power a boiler can use when heating water for your radiators or taps. The higher the output rate, the more water it can heat.

If the output rate is too low, your hot water might often be only lukewarm, and if it is too high, you will be paying more for your gas than you need to.

The Ariston CLAS ONE 38 combi boiler has an output of 31 kW, so which types of property would it be most appropriate for?

An experienced PlumbProud boiler engineer would recommend that this Ariston CLAS ONE 38 Combi boiler be installed in medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

With combi boilers, flow rates are as important a consideration as output rates.

All combi boilers draw water from the mains. They then heat this water instantly whenever it's needed and distribute it to your radiators and taps.

A boiler's "flow rate" describes how much water a boiler can draw from the mains at any one time, which it then heats and sends around your home (measured in litres per minute). This Ariston CLAS ONE 38 Combi boiler's flow rate is 8 L/m.

If your home has a large number of radiators, a lot of bathrooms, or multiple people who wish to use the hot water at the same time, your combi boiler may not be able to draw as much water from the mains as it needs to serve everyone, regardless of how high the flow rate is.

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 size of the Ariston CLAS ONE 38

The Ariston CLAS ONE 38 measures TBC mm high and TBC mm wide by a depth of TBC mm.

Is this Ariston boiler non-condensing or condensing?

Condensing boilers convert the warmth present in flue exhaust gases and water vapour condensation into heat which they then recycle to increase the temperature of the colder water returning to your system.

We recommend that homeowners choose a condensing boiler like the Ariston CLAS ONE 38 for this reason - the more recent your model the better because the technology improves every year.

You'll benefit from lower quarterly gas bills and condensing boilers are also much more environmentally friendly.

What energy efficiency ratings have been awarded to the Ariston CLAS ONE 38 combi?

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.

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 a Ariston CLAS ONE 38 combi boiler for your home be positive for the environment? Let's examine the figures.

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 38 has been assigned an efficiency rating of 90% with a SEDBUK rating of "A".

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 38 has an ERP rating of "A" for heat and "A" for hot water production.

Is this Ariston CLAS ONE 38 combi covered by a warranty?

The Ariston CLAS ONE 38 boiler comes with a 8 year warranty for parts and labour.


Ariston CLAS ONE 38 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating90%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW31 kW
MountingWall
Flow rate8 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%

Combi boilers

Choose from the UK’s biggest range of combis

Heat only boilers

The ideal boiler perfect for the largest homes

System boilers

Ideal for 3+ bedroom, 2+ bathroom homes

Boiler quote

Free, no obligation quote from our engineer

Ariston CLAS ONE 38 boiler

We will not be beaten on price -
ask us about our PRICE GUARANTEE!

Ariston CLAS ONE 38 Combi Gas boiler

  1. Home
  2. Ariston CLAS ONE 38
Plumbproud rating for this boiler
78.69%

On the PlumbProud quality scoring system, we rate this Ariston CLAS ONE 38 Combi boiler 78.69%. 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 Ariston CLAS ONE 38 Combi boiler by PlumbProud.

To get a free quote for the installation of the Ariston CLAS ONE 38 boiler in your home, simply enter your postcode in the box provided on this page. You can also find out whether this is the right boiler for your home by clicking to email our installation team or by calling us on 01604 343053.


Installed price guideline
£2,200

Get your free quote

Ariston CLAS ONE 38 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating90%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW31 kW
MountingWall
Flow rate8 L/m
ERP HeatA
ERP WaterA

Ariston CLAS ONE 38 Combi Gas boiler frequently asked questions

Which category of boiler does the Ariston CLAS ONE 38 fit into?

If you are considering installing a combi boiler in your house or flat, then the Ariston CLAS ONE 38 boiler is certainly worth investigating.

Traditional boilers have one or more large tanks in which they store either heated water or water to be heated later. Manufacturers originally introduced combi boilers to the market in the 1970s to enable homeowners to save space - UK residential properties are among the smallest in the Western world.

Combi boilers don't need these tanks because they draw water directly from the mains and instantly heat it on demand thanks to the technology inside the boiler. Combi boilers then distribute this hot water to your home’s taps and radiators when needed.

The most significant disadvantage of combi boilers is that they are not ideal in larger homes where multiple people might want hot water at the same time – for example, if someone is having a shower while another wants to wash dishes in the kitchen. This is because combi boilers have a maximum volume of water that they can heat. When two people want hot water at the same time, the water temperature, pressure and volume delivered to both points drop.

Would the Ariston CLAS ONE 38 combi boiler be suitable for 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.

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 Ariston CLAS ONE 38 combi is 31 kW kilowatts, so which types of property would this be most suitable for?

A Gas Safe boiler installer would say that this Ariston CLAS ONE 38 Combi boiler's level of output makes it suitable for installing in medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

With combi boilers like the Ariston CLAS ONE 38, you need to take the flow rate into account as well as the output rate.

Combi boilers draw water from the mains and then instantly heat that water and send it to wherever in your home it's needed. Flow rates, measured in litres per minute, are subject to the mains water pressure in your area. So, for example, if the local mains water pressure is 11 litres per minute and the flow rate of your boiler is 14 litres per minute, the boiler will not be able to process more than 11 litres per minute. The flow rate of this Ariston CLAS ONE 38 Combi boiler is 8 L/m.

If you live in a home with lots of radiators or bathrooms where many people want to use hot water at the same time, a combi boiler may not be able to cope. For reference, a power shower uses about 10 litres of water per minute. If two people want showers at the same time or one person wants a shower and the other hot water from a tap in the kitchen, your boiler may not have a large enough flow rate even if the local mains water pressure is high.

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 38 boiler?

The Ariston CLAS ONE 38 is TBC mm [H] by TBC mm [W] by TBC mm [D] in size.

Is the Ariston CLAS ONE 38 a condensing or non-condensing boiler?

The Ariston CLAS ONE 38 is a condensing gas boiler - we strongly suggest that you choose either this model or a recently released model if at all possible.

A condensing boiler captures and recycles the warmth present in flue exhaust gases and water vapour condensation created by the burning of gas to warm up the water coming back into your boiler - for example, from your radiators.

Condensing boilers cost less to run (lower gas bills) and are better for the environment.

How energy efficient is the Ariston CLAS ONE 38 combi?

How we heat our homes has become a major issue for many people worried about climate change and environmental issues in general.

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.

Would choosing the Ariston CLAS ONE 38 combi help the environment? Let's see what the statistics suggest.

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 ONE 38 was awarded an efficiency rating of 90% with a SEDBUK band rating of "A".

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 is to encourage manufacturers to create products that are more environmentally friendly and which reduce the harmful gas emissions associated with those products.

The ERP gradings for the Ariston CLAS ONE 38 are "A" for heat and "A" for hot water.

What warranty does the Ariston CLAS ONE 38 combi boiler come with?

The Ariston CLAS ONE 38 boiler has a warranty covering parts and labour costs for up to 8 years after installation.


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%
Menu