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Ariston CLAS ONE 38 boiler

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Plumbproud rating

78.69%

Ariston CLAS ONE 38 Combi Gas boiler

This Ariston CLAS ONE 38 Combi boiler has been rated at 78.69%. Our PlumbProud boiler quality rating system uses price installed, energy efficiency, likely running costs, the manufacturer's warranty and other factors to determine the rating we give.

This Ariston CLAS ONE 38 Combi boiler is likely to cost you £2,200 supplied and fully installed through PlumbProud, although there may be additional charges if the fit takes longer than anticipated. You will, however, receive a binding quote from us prior to starting work.

Please enter your postcode in the quote boxes on this page, email us, or call us on 01604 343053 to get a free quote and guidance on whether the Ariston CLAS ONE 38 boiler is the right choice for your home.


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

You may wish to consider installing the Ariston CLAS ONE 38 if you are looking for a combi boiler for your house or flat.

Traditional boilers have one or two tanks - one holds hot water to keep it warm and the other water for later heating. Because UK residential property is among some of the smallest in the world, manufacturers introduced combi boilers and the heat pumps that go in them in the 1970s to reduce the amount of space boilers needed to take up.

The hot water needed for your radiators and taps is available on demand when you have a combi boiler. Combi boilers use technology located within the boiler to heat cold water, which it draws from the mains, and to distribute hot water where it's needed around your home.

A combi boiler, however, has the disadvantage of a maximum capacity for the amount of water it can heat. The result is that if someone uses the shower while another uses a hot water tap simultaneously, the amount of water reaching each point falls, causing water pressure to drop.

Would the Ariston CLAS ONE 38 combi be a suitable choice of boiler for my house or flat?

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 heating engineer would recommend that the most suitable type of property for a Ariston CLAS ONE 38 combi would be medium-sized homes and larger apartments containing 10-15 radiators and providing hot water for two bathrooms.

Please remember to consider "flow rates" as well when choosing your new boiler. All combi boilers including the Ariston CLAS ONE 38 draw water from the mains.

Each combi boiler has its own flow rate (measured in litres per minute) - this tells you how much water it can heat and distribute to your home’s taps and radiators straight from the mains. This Ariston CLAS ONE 38 Combi boiler's flow rate is 8 L/m.

There is no benefit to you in choosing a combi with a high flow rate if your mains pressure is low - save money by buying a boiler whose flow rate is equal to or slightly more than the pressure in your water pipes.

In addition, if you have a lot of radiators and bathrooms in your home or you have a large household that often uses lots of hot water at the same time, like for regular morning and evening showers, a combi boiler may not be suitable.

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.


Ariston CLAS ONE 38 dimensions

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

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

Condensing gas boilers like the Ariston CLAS ONE 38 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 38 combi an energy-efficient boiler?

As more of us are increasingly concerned about climate change, how we heat our homes and its impact on the environment has become an issue of importance to homeowners.

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.

Will installing a Ariston CLAS ONE 38 combi in your home be a positive contribution to the environment? The figures below will tell you more.

The Ariston CLAS ONE 38 has been awarded an efficiency rating of 90% and a SEDBUK band rating of "A".

In the UK, all boilers manufactured and supplied must have an energy efficiency rating of at least 92% or a SEDBUK "A" grade. Until April 2018, the minimum rating was 88% (88% and 89% are equivalent to a SEDBUK "B" rating and anything higher is rated "A").

A boiler's energy efficiency rating describes the amount of energy it uses and wastes when in normal operation.

All products that consume energy throughout their lifespan must comply with the Energy Related Products (ERP) Directive.

Companies are legally obliged to reduce harmful gas emissions at all stages of a product's life cycle, from initial manufacturing right through to final disposal as well as when the product is in actual use.

The Ariston CLAS ONE 38 scores "A" for heat and "A" for water.

How long am I covered by the warranty for if the Ariston CLAS ONE 38 breaks down?

You receive a parts and labour warranty of 8 years with the Ariston CLAS ONE 38 boiler.


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%

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Ariston CLAS ONE 38 boiler

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Ariston CLAS ONE 38 Combi Gas boiler

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

According to our PlumbProud boiler quality scoring system, we rate this model 78.69%. We rank boilers using a number of different factors including price installed, manufacturer guarantees, energy efficiency, likely running costs, and more.

We anticipate the supply and installation cost for this model of boiler will be around £2,200 on a standard fit.

For a free, no-obligation quotation on this Ariston CLAS ONE 38 Combi boiler or for our professional advice on whether the Ariston CLAS ONE 38 is suitable for your property, please call 01604 343053, click here to email our team or enter your postcode into the quotation box on this page.


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

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

The Ariston CLAS ONE 38 may be worth considering if you are looking for a combi boiler for your house or flat.

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 38 combi boiler suitable for my house or apartment?

Selecting the right boiler for your property means selecting a boiler that is the right size. And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

The output of a boiler is measured in kilowatts. The output level determines the maximum power a boiler can use in heating the water needed for the baths, showers, taps and radiators in your home.

It's important to choose a boiler with an appropriate level of output for your property. Your boiler should be able to cope with periods of peak demand in your property and not just your average usage.

An output rate that is too low will result in an inadequate supply of hot water, while an output that is too high will mean the boiler will cost more to run than is necessary.

The output of the Ariston CLAS ONE 38 combi is 31 kW kilowatts, so which types of property would this be appropriate for?

A PlumbProud Gas Safe boiler installer would recommend that the level of output from this Ariston CLAS ONE 38 Combi boiler would make it a suitable installation option for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

If you are thinking about installing a combi boiler like the Ariston CLAS ONE 38 in your home, you should consider flow rates as well as output rates. This Ariston CLAS ONE 38 Combi boiler's flow rate is 8 L/m.

The flow rate indicates the maximum volume of water (measured in litres per minute) that your boiler can heat up and send to your radiators, taps and showers at any one time. The more taps and showers that could be in use simultaneously or the greater the number of radiators you have, the higher the flow rate you need.

However, you should establish what the mains pressure is at your property as a combi boiler can only heat the water that comes into your home.

For example, if your mains pressure is 12 litres per minute, your boiler can only heat and distribute hot water at a rate of 12 litres per minute even if it has a higher flow rate capacity. Typically, a power shower will require 10 litres of water 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.


Dimensions of the Ariston CLAS ONE 38 boiler

The Ariston CLAS ONE 38 measures TBC mm in height by TBC mm in width by TBC mm in depth.

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

The Ariston CLAS ONE 38 is a condensing gas boiler - in fact, we recommend that you select this model or one of the latest condensing boilers on the market as the technology continues to improve over time.

Condensing boilers capture the heat still present in the flue exhaust gases and water vapour condensation created when the gas is burned and they recycle this back into the heating system to warm up the cold water re-entering the boiler from your radiators.

They're much more environmentally friendly and installing one results in much lower annual gas bills.

How energy efficient is the Ariston CLAS ONE 38 combi?

How we heat our homes and the damage this does to the environment has become a pressing concern for many homeowners worried about the effects and impact of climate change.

Central heating creates 14% of the UK’s greenhouse gases. And in Britain's larger cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Is the Ariston CLAS ONE 38 combi boiler an environmentally friendly choice for your home? Here’s what the figures say.

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 Energy Related Products Directive, also known as ERP, is European legislation that intends to reduce energy consumption related to products right from the initial manufacturing process through to eventual final disposal.

The purpose of the directive is to encourage manufacturers to create new products that are kinder to the environment and which result in lower overall harmful gas emissions through a product's entire life cycle.

The Ariston CLAS ONE 38 has a rating of "A" for heat and "A" for water.

Is there a warranty on the Ariston CLAS ONE 38 combi boiler if it breaks down?

The parts and labour warranty on the Ariston CLAS ONE 38 lasts for 8 years.


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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