NIOSHTIC-2 Publications Search
Investigation of Contamination of Fresh Air Supply at the Food and DrugAdministration Building, Washington, D. C.
Humphreys CM; Oser JL
NIOSH 1967 Mar:4 pages
Exhaust fumes from various laboratories in a building are found to be reentering the building through the fresh air inlets through a cross connection resulting from exhaust vents being flush with the roof and fresh air inlets being above the roof. The suggested correction method is a combination of the following: raising exhaust outlets above roof level by means of short stack extensions, discharging exhaust fumes upward at high velocity, and reducing amount of fresh air taken in at roof level.
Ventilation-systems; Exhaust-systems; Air-quality-control; Environment-control; Air-contamination; Health-engineering;
NIOSH, National Center for Urban and Industrial Health, Report No. TR-37, 4 pages
Page last reviewed: January 14, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division