Heat networks are now included in the guide for which MEHNA members have given advice. It also now covers the principles of Train, Assess, Control, Prove – a best practice approach to water treatment.

This comprehensive document deals with all aspects of water treatment for a non-domestic heating system or heat network. The industry bodies responsible for the guide trust that by studying the contents and following the freely given advice, non-domestic heating systems and heat networks systems will operate trouble-free, safely, and more efficiently.

It has been divided into four sections covering the TACP best practice approach to water treatment. These are:

  • Train: The competency of individuals carrying out maintenance of heating systems and the responsibility of heating system owners
  • Assess: Where the system is analysed, the incumbent water treatment if present, is assessed and appropriate methodologies are considered
  • Control: Whereby the water treatment is installed, and an appropriate monitoring and ongoing maintenance scheme is established
  • Prove: To record and document that all the maintenance and monitoring requirements have been undertaken.

The guide is intended to be read and understood by plant operators, engineers, and personnel with limited or no knowledge of water treatment chemistry or physical devices, to help them understand what effect system water and its subsequent treatment will have on their heating system.

Neil Watson, Chair of the ICOM/MEHNA Water Treatment Group, said: “Water treatment plays a crucial role in minimising energy consumption within residential and commercial heating systems and is essential for maintaining the validity of equipment manufacturers' warranties.

“This comprehensive guide, developed through a true collaboration of industry experts – including appliance manufacturers, water treatment specialists, consultants, product suppliers, system design and maintenance engineers, equipment manufacturers, and training providers – covers all commercial treatment processes currently adopted in the UK market.”