0 a piece of equipment for removing harmful substances from the air so that people do not breathe them in:
The association recommended using air filters in the home to cut down on indoor air pollution.
The buildings are equipped with an air filter that removes the smallest particles, including all bacteria and viruses.
The air filters that are supposed to keep radioactive particles from escaping into the air might not hold up during an accident.
He suggests using air cleaners with HEPA filters to combat pet allergies.
The smokers' room features a central air cleaner and four extractor fans.
