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BS 7593:2019: The Code of Practice for Domestic Heating and Cooling Systems

BS 7593:2019 is a code of practice introduced by the British Standards Institute for the preparation, commissioning, and maintenance of domestic central heating and cooling water systems. Released in 2019, it represented an industry shift towards a more holistic way of working to not only improve boiler protection but safeguard the entire system so it performs at its optimum level. As a result, energy use is reduced, meaning lower household bills and fewer carbon emissions — an important consideration in an increasingly eco-conscious world.

The BS 7593 standard applies to systems in individual domestic premises and in apartment complexes with multiple dwellings. It is a regulatory requirement within Building Regulations, Part L. Compliance with the standard can significantly enhance the efficiency and life expectancy of a household heating and cooling system while also reducing carbon emissions.

Some important takeaways from the BS 7593:2019 code of practice are that it applies to both closed loop heating and cooling circuits. A permanent in-line filter must be fitted to provide continued protection and maintain system efficiency. It is important that the chosen filter can effectively capture and contain both magnetic and non-magnetic debris to keep the system as clean as possible.

How often should I have my system tested?


Before inhibitor is added to a system, a chemical clean and fresh water flush should take place. In-line filters are required for ALL systems, and an annual on-site water test is required to check inhibitor levels and system cleanliness. Inhibitor should be re-dosed every five years or a full system water test should be carried out.

External magnetite capture equipment and mechanical vibration of radiators can be used to enhance cleaning. Biocide is required in cooling and low temperature heating systems to protect against microbial fouling. Biocide can also be added to higher temperature systems for extra protection during downtime.


Adding Adey Cleaner to Magnet Filter


What is the cost of implementing this standard?

The cost of implementing the BS 7593:2019 standard can vary depending on the specific requirements of your heating and cooling system. Some of the costs associated with implementing the standard may include the installation of a permanent in-line filter, chemical cleaning and fresh water flushing of the system, and the addition of inhibitor to protect against corrosion and scale. Servicing of in-line filters is recommended as part of the re-commissioning process, ideally as part of the annual boiler service.

What are the benefits of implementing BS 7593:2019?

Implementing the BS 7593:2019 standard can provide numerous benefits for both homeowners and heating professionals. By following the guidelines set out in the code of practice, you can ensure that your system is performing at its optimum level, which can result in lower household bills and fewer carbon emissions. Additionally, compliance with the standard is a regulatory requirement within Building Regulations, Part L.

For heating professionals, following the BS 7593 code of practice can improve boiler protection and safeguard entire systems, enhance their professional reputation, win repeat business from happy customers, save consumers money with lower energy bills, and protect the planet through reduced carbon emissions.

BS 7593:2019 provides clear guidance on best practices for preparing, commissioning, and maintaining domestic central heating and cooling water systems. By following these guidelines, engineers can ensure that your system is performing at its best while also reducing your carbon footprint.

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