Clocks go back - how to maximise BEMS efficiency when the nights draw in   

The day the clocks go back truly signals a new season – colder days and darker nights abound; but it’s also a good time to undertake your next Building Energy Management System (BEMS) audit.

This year, the UK will turn back one hour on Sunday 28th October (so don’t say we didn’t warn you…now you can make the most of the extra hour’s lie-in!).

When the clocks go back in the calendar, they must also be updated on your BEMS. If they’re not updated then your BEMS settings will be one hour out for six whole months, and that can have a significant impact on building operations and costs of running plant unnecessarily.

Put simply, if your BEMS is unable to react quickly to create optimal comfort conditions based on criteria such as levels of occupation, ambient temperature and patterns of usage, it will fail to serve its intended purpose.

Autumn is the perfect time to consider a BEMS audit, which will not only optimise and reset time clocks and setpoints, but also drill down to the finer details and provide guidance about implementing appropriate technologies like variable speed drives (VSDs) . It is often the case that adjustments can be made to the BEMS during the audit visit itself that will deliver immediate savings, while component parts can also be checked to make sure they are working correctly.

People often forget that when a BEMS is first commissioned it is configured around an existing or even an expected building layout and occupancy patterns. Throughout the year these can change and incorrectly configured time clocks, setpoints, new layouts, repartitioning, or the addition/relocation of equipment can have a detrimental effect on energy consumption.

Where an audit really comes into its own though is in its ability to help construct an energy management plan that features a prioritised summary of activities that should be carried out in the short, medium and long-terms. It will help break the project down into ‘bite sized chunks’ that initially focus on gathering utilities based data, identifying wastage, and then prioritising ways to reduce overall energy consumption.

We have also launched a BEMS Risk Assessment Report this month, giving you a succinct overview of the BEMS asset resilience across your estate; identifying risk factors and recommending how best to tackle them – either immediately or over time.

Remember, a BEMS should always be considered a work in progress and maintaining it on a regular basis and carrying out a scheduled audit will help maximise any energy and cost saving opportunities provided by this technology.

For more information about the BEMS Risk Assessment Report, contact Daniel Taylor on

Alternatively, speak to your local Trend Partner – to find yours, click here.



Published  on  22/10/2018  by  James Tate
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