Bob PaulHEPA filters alone does not constitute an Indoor Air Quality plan. Each school presents unique challenges & require an independent Industrial Hygienist Air Quality Inspection. Typically, in the winter season schools fail to achieve healthy ventilation rates
Angie Adamson@Bob_Paul Bob, this made me think about all the Scandinavian novels I have read, where there is always a description of people leaving bedroom or office windows open regardless of the season to get fresh air. Yet the English-speaking world with UK origins keep everything battened down. Our indoor air quality has got far worse with the popularity of split system AC, and sealed buildings (buses and trains) relying on AC.