Ariston Clas HE System Evo

Ariston sells boilers in over 150 countries worldwide. They’ve been selling boilers in the U.K for 50 years. They must be doing something right to operate for that length of time. Or so you’d think…

Which? gives them a brand score of 50%, which doesn’t inspire confidence in Ariston boilers. If we take a look at Ariston’s Trustpilot profile it’s pretty much the same story with a 2.5 out of 5 average rating. Poor customer service is mentioned a lot, as well as warranties not being fulfilled.

Ariston boilers are kind of pitched at the mid-range, competing with brands like Ideal and Baxi, which are generally both cheaper and more reliable. In fact, for a little bit more money than you’d pay for an Ariston boiler, you could get a Worcester Bosch with better cover, better aftercare and it would generally last longer.

If you’re looking for a reliable mid-range boiler we’d recommend Ideal boilers. Our Ideal boilers come with a massive 8-year guarantee and start from just £1549 for the Ideal Logic range, which is a great price for a mid-range boiler with the reputation and aftercare Ideal offer.

Ariston offers a range of combi, system and regular boilers in a range of kW outputs that would be suitable for small flats to very large homes. However, customers and engineers alike seem to regret purchasing an Ariston boiler on the whole, so whether you’d want to purchase an Ariston boiler is your choice.

If you aren’t sure what boiler type you have, check out our blog, it’s important to know your boiler type before getting any boiler quotes.

Once you know what boiler type you’re looking for, you can use the WarmZilla boiler comparison function below. Just select up to 3 boilers you want to compare and you’ll be able to compare key stats side by side to see which Ariston (or other boiler brand) is best for you.

You can also take the WarmZilla survey, by answering a few simple questions about your home we will be able to recommend suitable boilers for your heating and hot water requirements. You can get a quote on a new boiler in just a few minutes without adding any personal details.

WarmZilla does not sell Ariston boilers, instead, we offer Ideal boilers which we feel occupy the same space in the boiler market but at more reasonable prices and with better aftercare.

Ariston boiler prices vary depending on the model you choose and the kW output of the model you require. The Ariston Clas One combi boiler will cost you around £750 just for the boiler alone without installation and all the extras you get with a WarmZilla boiler. You’d pay the same or slightly less for a similar Baxi boiler.

Boilers sold by WarmZilla come with Gas Safe installation, system filter, system cleanse, inhibitor, wireless thermostat, up to 14 years guarantee, any flues or extension kits you may need; plus, if your condensate or gas pipes require upgrading – that’s included in your fixed price boiler quote too!

You can get a quote now on a new boiler with all the extras mentioned above, in a few minutes using the WarmZilla online survey.

Your Ariston boiler should last you between 10-15 years, however, this depends on how well you maintain your boiler. Over time, your boiler’s efficiency will naturally decline slightly, however, annual servicing and regular maintenance will ensure that your boiler is working as efficiently as possible.

To ensure that your boiler warranty remains valid, your Ariston boiler needs to be serviced annually by a Gas Safe registered installer.

What are the standard checks carried out by a Gas Safe engineer? 

• Water leaks
• External damage to the boiler
• Condition of the electrics
• Evidence of poor-quality installation
• Suitability of boiler controls
• The proximity of combustible materials to the boiler
• Accessibility for repair and servicing
• Signs of overheating

Your Gas Safe engineer should also check that your boiler is operating correctly, that the main components are checked, as well as the burner, heat exchanger, main injector and spark sensor probe. The gas measurements should also be taken to ensure that they are within the correct limits allowed by the manufacturer’s standards.

The boiler tightness will also be checked, to ensure that no gas is able to escape from the boiler. An analysis of the flue gas combustion will also be measured during your boiler service to make sure that your boiler is working to its maximum efficiency.

With an output of 18kW for central heating, this system boiler can comfortably heat a home with up to 15 radiators and a single bathroom. However, if your home requires a higher demand for central heating, the Clas HE Evo 24kW, Clas HE Evo 30kW,  Evo 24kW or Evo 30kW system boiler may be more suitable.

System boilers are ideal if your home requires instant hot water in multiple bathrooms simultaneously. This is thanks to the additional hot water cylinder that is installed in an airing cupboard or similar sized space, alongside your boiler unit. It is important to take note of this when purchasing a new or replacement system boiler, as you will need the extra room in your home. If space is limited in your property, then a combi boiler will be a better option.

The Ariston Clas HE System Evo 18kW also has an efficiency rating of 90% and an ErP A-rating for heat, which means that this boiler could help lower your energy bills, depending on the efficiency of your current heating system. 

With an output of 24kW for central heating, this system boiler can comfortably heat a home with up to 15 radiators and a single bathroom. However, if your home has a higher demand for central heating, the HE Evo 30kW system boiler may be more suitable. 

System boilers are ideal if your home requires instant hot water supplied to two bathrooms at the same time. This is thanks to the additional hot water cylinder that is installed in an airing cupboard or similar sized space, alongside your boiler unit.

It is important to take note of this when purchasing a new or replacement system boiler, as you will need the extra room in your home. If space is limited in your property, then a combi boiler will be a better option.

The Ariston Clas HE System Evo 24kW also has an efficiency rating of 90% and an ErP A-rating for heat, which means that this boiler could help lower your energy bills, depending on the efficiency of your current heating system.

This boiler model, the Clas HE System Evo 30kW is the most powerful in its range. With an output of 30kW for central heating, this system boiler can comfortably heat a home with up to 20 radiators and 1-2 bathrooms. Many smaller homes will not have this demand for central heating and hot water, in this case, the HE Evo 18kW or 24kW may be more suitable for your home.

System boilers are ideal if your home requires instant hot water in multiple bathrooms at once. This is thanks to the additional hot water cylinder that is installed in an airing cupboard or similar sized space, that stores water ready for when you need it.

It is important to take note of this when purchasing a new or replacement system boiler, as you will need the extra room in your home. If space is limited in your property, then a combi boiler will be a better option.

The Ariston Clas HE System Evo 30kW has an efficiency rating of 90% and an ErP A-rating for heat, which means that this boiler could help lower your energy bills, depending on the efficiency of your current heating system.