As we entered a period of extended ‘lockdown’, and our employees have mostly remained remote working status during the 2020/21 period, we expected a substantial reduction in our overall energy consumption and carbon footprint. Where in some places this has been the case, there is an interesting story to tell on where this has instead resulted in increases in energy usage (namely gas).
Where office occupancy has been low, and temperatures must remain stable to accommodate the low numbers of employees on site, there has been an increase of gas heating to ensure the offices can appropriately accommodate this. This has resulted in a large use of energy for a modest number of people and is able to offer an explanation as to why we have achieved no reduction in our gas consumption in 2020/21 from our 2019/20 dataset.
Temperatures in office buildings reflect its occupancy levels[1] and additional heating is required during lower than usual occupancy to ensure compliance with the Workplace (Health, Safety and Welfare) Regulations 1992 [2], which places a legal obligation on employers to provide a ‘reasonable’ temperature in the workplace.
A similar story can be told about our water usage across the buildings we occupy. The reduction in office occupancy has resulted in lower-than-normal use of water within these buildings. Due to impact of minimal water usage, there is a need to maintain the water systems and undertake appropriate measures to prevent legionella growth. Water system stagnation occurs due to lack of use, which increases the risks of Legionnaires’ disease [3]. Regular flushing of toilets, running taps and other water systems has had to be deployed during the period of low occupancy to fulfil our obligations in respect of legionella.