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Ariston Alteas ONE Net Combi Boiler

The Ariston Alteas ONE Net is a top of the range gas condensing boiler that comes Boiler Plus ready straight out of the box. 

If you’re looking for a replacement combi boiler for your home, the Ariston Alteas ONE Net will not disappoint. It features a built-in Wi-Fi and digital timer programming and has been awarded the Good Design Award for its sleek Italian design. The boiler also boasts a unique set of innovative smart functions and several customisation options to satisfy all of your requirements. 

How Much Does this Boiler Cost?

The Ariston Alteas ONE Net Combi comes in a choice of two outputs of 30kW and 35kW and costs between £1,100 and £1,350, depending on the boiler size you require. You also have to pay the installation cost, which can vary depending on the amount of work involved to replace your boiler. We recommend you get a quote from local and national installers to find the best price.  

How will I know if this Boiler is Suitable for My Home?

Combi boilers are a popular choice for most homes because they provide hot water on demand and do not require a separate cold water tank or hot water cylinder. However, combi boilers are generally not the best solution for homes with more than one bathroom as they can struggle to cope with two baths or showers running at once. One of the benefits of getting the Ariston Alteas ONE Net Combi installed is that it heats water directly from the mains, meaning it can deliver heating and hot water almost instantly.  

You must select the right boiler type and size for your needs, so be sure to get the unbiased opinion of a Gas Safe registered engineer before making any decisions. 

Is it a High Efficiency Boiler?

Yes, the Ariston Alteas ONE Net Combi can reach an impressive A+ energy rating. It delivers safety in any environment and features ONE condensing heating technology and thermoregulation accessories to enhance efficiency. 

Does this Boiler have a Good Range of Controls and Features?

Absolutely. The Ariston Alteas ONE Net Combi is an award-winning boiler for its sleek design and has an ultra-safe black glass front panel and a modern display for easy temperature management. This combi boiler comes with a ‘Comfort’ function, digital pressure gauge, in-built timer programming, an XtraTech stainless steel heat exchanger and a Cube RF and receiver. The Alteas ONE Net Combi’s ‘Auto’ function monitors the temperature of your heating system and adjusts the boiler operation accordingly to optimise energy efficiency. It also offers compact dimensions and easy access to internal components, which will please your heating engineer.

How long is the Warranty on this Boiler?

The Ariston Alteas ONE Net Combi comes with a lengthy 12-year warranty as standard.  

Summary of Important Information

  • Expect to pay between £1,100 and £1,350
  • Heating output of 30kW or 35kW 
  • Hot water flow rates of 12.3 or 14.1 litres per minute
  • Dimensions of 745mm (H) x 400mm (W) x 385mm (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • 12-year warranty as standard

Pros and Cons

Ariston’s Alteas ONE Net Combi is a sleek, high-efficiency boiler with an excellent set of controls. When you choose to have this combi boiler installed, you can even use the Ariston NET app to set, change and control your heating and hot water temperature from your smartphone or PC wherever you are.  


  • Suited to small, medium and large-sized homes 
  • Easy to install, use and service
  • Award-winning design
  • XtraTech stainless steel heat exchanger – improves water flow and enhances heating performance
  • Built-in Wi-Fi and digital timer programming
  • Boiler Plus ready
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Ariston NET app ready – comes with a modulating Cube RF wireless thermostat  
  • 12-year warranty


  • Ariston has a Which? brand score of 55% – correct at the time of writing – January 2022
  • Poor rating on Trustpilot – correct at the time of writing – January 2022
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