Lessons from history

Bill Bordass warns about the ‘forgetting curve’ and looks again at the benefits of the 2+1 window

What’s cooking – measuring PM2.5

To ensure indoor air quality measurements in homes are accurate and repeatable, we need standards that clearly define sensor types, calibration methods, sampling frequency, averaging periods and measurement locations, says the University of Nottingham’s Benjamin Jones

How catalysts in AHUs can improve indoor air quality

Electrostatic precipitators can stop PM2.5 dust particles from entering buildings, but could create dangerous levels of ozone. Catalysts in AHUs may be the answer, says Staffordshire University’s Derek Wardle

Post-occupancy evaluation of hybrid ventilation in schools

Temperature and air quality in classrooms are known to affect learning, but new schools are often built on tight budgets and with low carbon ambitions. Post-occupancy evaluation is adding to the evidence for local hybrid ventilation systems, says BAM Construct UK’s Paula Morgenstern