The World's Premier unvented cylinder
and water heater manufacturer.
Merloni TermoSanitari (MTS group), the company behind the famous Ariston brand, are the world's largest manufacturer of HIGH SAFETY unvented water storage heaters. 50 years of experience, ensures that all of our products are designed and built with the utmost professional care. All products carry the IMQ, CE mark and, more importantly are certified by UK testing bodies such as the Water Research Council (WRc) and the British Board of Agrement (BBA) where appropriate.
This grants both installers and users maximum safety and reliability.

The MTS groups' production system
wins International approval.
Each Ariston water heating product is designed to ensure high quality and reliability.
Every single production process complies with the "High Quality" project drawn up by the MTS group, to guarantee long standing high quality standards. In eight factories, every single phase of the production, from the planning and the selection of the raw materials to the actual production and marketing, complies with the ISO Norm 9001, the most stringent quality control at international level.

Hot water where you want it and
when you want it.
Whether hot water is required for a small loft conversion or for the total requirement of a large property, there is an Ariston unit to suit. With the largest range available on the UK market, you know that an Ariston can be specified with confidence. Units 5 to 500 litres to meet all needs: wall mounted or floor standing, above or under sink. Each model designed at meeting the customers' requirements at the highest level.

Quick, simple and economical to install.
All units are supplied with the necessary controls to meet the stringent UK legislation. The unvented cylinder range controls are one piece, making the installation even quicker, simple and economical to install. Accessories are available for those installations that require special needs.

Respect for the environment.
The MTS Group cares for the environment, and ensures this by carefully selecting materials used during the manufacturing process. The components used in Ariston products are fully recyclable.