Clas System ONE 18

The Clas System ONE gas condensing boiler boasts our patented XtraTech™ stainless steel heat exchanger for more efficient heating and better reliability. Its 1:7 modulation ratio means it can adapt to provide the desired heating, while simultaneously keeping fuel bills low. The Clas System ONE is easy to operate through its back-lit display and is compatible with Ariston controls for use with the Ariston Net app and comes with an 8 year warranty as standard.

SKU: ARI-CLASSYS-18 Category: Tag:

Description

Key features

Energy Class A
Super energy efficient with ‘A’ class ErP rating.
Auto Function
The ‘Auto’ function monitors the temperature of your heating system and adjusts your boiler’s operation accordingly – reducing peaks in flow temperature and thereby optimising energy efficiency.
Super Silent
Super silent operation
Easy Maintenance
Easy access for any maintenance requirements.

Advantages & benefits

  • XtraTech™ Stainless Steel Heat Exchanger
  • “Auto” function technology
  • Comfort function
  • High efficiency pump
  • 1:7 modulation

Discover its features

Ariston PER4MANCE System

Ariston PER4MANCE System

4 technologies for an exclusive performance: XtraTech™ stainless steel heat exchanger; Absolute Efficiency: A energy class; Full control, full comfort; Always connected with Ariston NET.

Durable Heating

Durable Heating

ONE condensing technology ensures reliable performance for the best comfort at home, every day. Our XtraTech™ heat exchanger is designed with wider pipes, resulting in an improved water flow and enhanced heating performance.

Absolute Efficiency

Absolute Efficiency

The innovative ignition system in our ONE Series boilers delivers consistent heating performance, advanced control and safety in any environment. Plus, ONE condensing heating technology and thermo regulation accessories enhance efficiency, while achieving performances of up to A+ energy class.

Full Control, Full Comfort

Full Control, Full Comfort

Our ONE Series boilers boast a unique set of innovative smart functions for simple and stable temperature setting and lots of customisation options to satisfy all your needs. Features include our ‘Auto’ and ‘Comfort’ functions as well as in-built timer-programming.

Smart Connectivity

Smart Connectivity

With the Ariston NET app you can set, change and control your heating, and hot water temperatures at any time, from your smartphone or PC, wherever you are.

Italian Design

Italian Design

The design of the ONE Series merges elegant esthetics, new materials and technological user interfaces for an even more comfortable experience. The modern display boasts easy temperature management, while the compact structure has been designed to guarantee easy access to internal components while offering compact dimensions.

Technical data

Specification Clas System ONE 18 Clas System ONE 24 Clas System ONE 30
Efficiency
ErP rating — heating/DHW A A A
Seasonal space heating efficiency 94% 94% 94%
Noise level 51 dB 49 dB 51 dB
SEDBUK rating A Band A Band A Band
SAP efficiency 2005 90.2% 90.1% 90.3%
SAP efficiency 2009/2012 89.4% 89.5% 89.5%
Power & performance
Heat output max (CH) 18 kW 22 kW 28 kW
Heating temp — high range (min/max) 35/82 °C 35/82 °C 35/82 °C
Heating temp — low range (min/max) 20/45 °C 20/45 °C 20/45 °C
Characteristics
Minimum ambient temperature 5 °C 5 °C 5 °C
Built-in expansion vessel capacity 8 l 8 l 8 l
Servicing clearances — top/front/bottom 300/450/250 mm 300/450/250 mm 300/450/250 mm
Servicing clearances — left/right 5/5 mm 5/5 mm 5/5 mm
Weight 28.5 kg 28.5 kg 31.1 kg
NOx 57 mg/kWh 53 mg/kWh 51 mg/kWh
Electrical data
Electrical supply 230/50 V/Hz 230/50 V/Hz 230/50 V/Hz
Protection grade (IP) IPX5D IPX5D IPX5D
Product codes
Ariston product code 3301046 3301047 3301048

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