Fresh thinking: Importance of indoor air quality metrics

Indoor air quality is not easy to measure, but metrics must move towards environments that consider occupant health, says the University of Nottingham’s Benjamin Jones in his round-up of discussions at an Air Infiltration and Ventilation Centre workshop on IAQ

Opportunity NOx: Testing standards for air filters

There is now one global testing procedure and classification system for particle air filters – which should have a positive impact on urban air quality and people’s health, as Peter Dyment reports

Tiers for fears: How to ensure data centres keep companies flying

The meltdown of British Airway’s IT systems, after a power-supply failure, demonstrates how critical data centres are to business operations. Andy Pearson looks at levels of resilience and explains why cloud computing is making firms more susceptible to power cuts

A Chicago thriller – chiller replacement

Replacing a district cooling system with chillers required a helicopter to lift new plant into a tiny room 200 metres above Chicago. Cyclone Energy Group’s Benjamin Skelton describes the challenge