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Respiratory and Thermal Physiology of Face Masks.

Authors
DuBois-AB
Source
John B. Pierce Foundation Laboratory, New Haven, Connecticut 1992 Jun:17 pages
Link
NIOSHTIC No.
00215355
Abstract
Factors which may influence the thermal discomfort associated with wearing respirators were investigated. In a series of experiments, subjects wore face masks at rest or during exercise, at different air temperatures, mask air temperatures, and humidities. Skin temperature, heart rate, skin wetness, and subjective ratings of thermal discomfort were determined. Results were compared with those for subjects not wearing face masks. The pathways of heat transfer from skin to mask and from mask to the environment were studied. Mask wall temperature was lowered through evaporative cooling of the outer surface of the experimental mask, and the effects on thermal comfort and acceptability of the face mask were determined. Results indicated that, at rest, skin temperatures of the face above 34.5 degrees-C were uncomfortable. During exercise, skin temperatures below 31 degrees were comfortable. Evaporative cooling of respirator face masks increased subjective comfort.
Keywords
NIOSH-Grant; Respirators; Respiratory-protection; Humans; Temperature-effects; Respiratory-protective-equipment; Face-masks;
Contact
None John B Pierce Foundation, Inc 290 Congress Avenue New Haven, Conn 06519
Publication Date
19920630
Document Type
Final Grant Report;
Funding Amount
396175.00
Funding Type
Grant;
Fiscal Year
1992
NTIS Accession No.
PB93-234201
NTIS Price
A03
Identifying No.
Grant-Number-R01-OH-02564
NIOSH Division
OEP
Priority Area
Respirator Research; Respirators;
Source Name
John B. Pierce Foundation Laboratory, New Haven, Connecticut
State
CT;
Performing Organization
John B. Pierce Foundation Lab, Inc., New Haven, Connecticut
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