title: Use of portable filter units to control the animal house environment.
abstract: The application of portable recirculating filter units to the control of laboratory animal house environments was investigated. Under practical conditions such a unit effected reductions in the ammonia level and bacterial content of the atmosphere of a room housing rats.
mesh_terms: D000641:Ammonia / Q000032:analysis; D000818:Animals; D000830:Animals, Laboratory; D001419:Bacteria / Q000302:isolation & purification; D002980:Climate; D005374:Filtration; D006813:Humidity; D008834:Microclimate; D051381:Rats
chemical_list: D000641:Ammonia