Why space volume matters in Covid-19 transmission

It’s not just ventilation that removes viable virus from indoor air. To understand the risk of transmission of Covid-19, the University of Nottingham’s Benjamin Jones and Chris Iddon say other mechanisms that are dependent on the volume of a space have to be considered

Research on indoor air quality for homeworkers

Millions of people now work from home because of Covid-19 restrictions, but are they working in a healthy environment? Researchers have assessed the impact on indoor air quality in eight homes. Anastasia Mylona reports

Air of authority: interview with Professor Catherine Noakes

Professor Catherine Noakes’ knowledge of ventilation and infection transmission has made her one of the government’s key scientific advisers on Covid-19. In recognition of her work, she was made an OBE last month. Alex Smith talks to her about the challenge of winter and the impact of infection control going mainstream

Case study: retrofit of Fairfield Halls theatre

Fairfield Halls theatre in Croydon is a prime example of 1960s public architecture, so when Max Fordham was asked to devise a services strategy during a major refurbishment, it had to stay faithful to the original while maintaining 21st-century comfort and efficiency. Andy Pearson reports

Unwanted guests: bipolar ionisation in hotel rooms

Bipolar ionisation can improve air quality and remove odours from hotel rooms, says Spire Building Services’ Adam Taylor, who highlights research in Spain on its use to reduce the risk of Covid-19

Understanding Hepa filters

An appropriately specified Hepa filter can be used in mechanically ventilated spaces and recirculating systems to practically remove small airborne particulates. CIBSE Journal technical editor Tim Dwyer looks at what must be considered when integrating them into HVAC systems

Clear guidance: TR40 Best practice for exhaust ventilation

The risk of death and illness because of exposure to hazardous substances in the workplace can be cut by following the best practice guidance in ILEVE and BESA’s new TR40 publication. Alex Smith summarises the guidance aimed at the safe design and installation of local exhaust ventilation