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Ariston Alteas ONE+ Net Boiler – Review

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Witten by Bernard Morgan (Engineer).
First Published: January 2, 2024. Updated: February 15, 2024

Boiler only price: from £1,515.82

(Boiler only price: comparing multiple suppliers stocking this boiler. Correct January 2024).

The Ariston Alteas ONE+ Net gas combi boiler has won awards for its modern design and sleek finish. While the black finish might not be to everyone’s taste, it does have an ultra-safe front panel. This guarantees it will not break under pressure. Available in a 35kW model, this model is suitable for medium-sized homes with up to 2 bathrooms.

  • Operates 1:10 modulation ratio
  • Features built-in WiFi and digital timer programming
  • Has an energy rating of 94% and an ErP rating of A
  • Compact design – can be hidden in a cupboard or take up little wall space in a kitchen or bathroom
  • Available with an extended warranty period
  • Quiet operating volume starting at 51dB
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Technical Specification

Manufacturer Ariston
Model Alteas ONE+ Net
Condensing Yes
Efficiency Rating 94%
Energy Efficiency Class A Rated
LPG Compatible Yes (no conversion kit required)
20% Hydrogen Mix Ready Yes
Hot water flow rate 14.1 litres/minute
Warranty 12 years
Central Heating Max. Output 30 or 35 kW
Mounting Wall mounted 
Weight 36kg
Dimensions 745mm (Height) x 400 (Width) x 385mm (Depth)

Key Features

  • The Ariston Alteas ONE+ Net combi boiler is a high-performance boiler with a good energy efficiency rating
  • Award-winning top-of-the-range model with a stylish Italian design
  • Italian made, with a stunning black finish and a range of impressive safety features
  • Comes with an extended warranty period of 12 years
  • Include Ariston’s patented Xtratech™ stainless steel heat exchanger, providing reliability
  • LPG compatible without additional conversion kit

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Our thoughts

The Ariston Alteas ONE+ Net is a good-looking boiler. It’s 94% efficient and uses a stainless steel heat exchanger. As a combi boiler you will have the convenience of on-demand hot water without the large hot water tanks.

Energy efficiency

This boiler has an ‘A’ ErP rating and operates at 94% efficiency. This will ensure that your energy bills stay low. The ignition system features an electronic combustion control that monitors the quality of the burn. This ensures efficiency and allows both natural gas and LPG to be used.

Performance

High-performance boiler with a modulation ratio of 1:10 and a central heating output of up to 31kW. It is also quiet, meaning it can be installed almost anaywhere.

Smart technology

The Ariston Alteas ONE+ Net boiler is compatible with Ariston Net. This is Ariston’s own smart technology, designed and manufactured by them. Ariston Net allows you to start, stop and monitor the temperature of your heating and water temperature through an app. It can even work as diagnostic support if your boiler is malfunctioning. The boiler is also compatible with other smart thermostats, including Nest and Tado.

Made in Italy

The Ariston Alteas ONE+ Net boiler is compatible with Ariston Net. This is Ariston’s own smart technology, designed and manufactured by them. Ariston Net allows you to start, stop and monitor the temperature of your heating and water temperature through an app. It can even work as diagnostic support if your boiler is malfunctioning. The boiler is also compatible with other smart thermostats, including Nest and Tado.

Final thoughts

We like this boiler, but it’s not our favourite and we don’t install a lot of them. The main reason for this is that other brands offer a wider range of power outputs to better suit different home requirements.

We love their stainless steel heat exchanger, as they almost always outperform aluminium. We’re not keen on their limited range of power outputs.

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