How clean is the air in your office?
BBC News By Natalie Lisbona image copyrightGetty Images image captionPrior to Covid, most of us only thought of an offices ventilation system if it was too hot to too cold, or when it broke down Raefer Wallis is a man very much in demand. Due to the coronavirus pandemic, he says he has seen requests for his services from around the world soar tenfold this year. "Since Covid the rush for indoor air quality improvements has gone through the roof," says Mr Wallis, who is also a practising archite...
Source: bbc.com