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.
