Three different types of #DIYpurifiers from £47 to £97 from readily available components in the UK

Guide to purchasing an air purifier for your school. What to look out for, how many you need and tips on where to best place the purifier

Calculate how many purifiers you need per class, the no. air changes per hour and what it costs with our nifty Excel calculator

Top tips on what to do once you purchase your class purifier. This includes best placement, when to run it and filter lifespan

With the government behind insulation schemes, let's look at why the Victorians believed ventilation was essential to let buildings breathe