Most fire departments require use of self-contained breathing apparatus for exposures above 50 ppm. Maximum allowable 8-hours work place exposure, (OSHA). Some residential detectors might give a low-level alarm after several hours exposure. Maximum allowable outdoor concentration for one-hour period in any year, EPA (ASHRAE) (Greiner, unpublished)Ģ1 percent increase in cardiorespiratory complaints (Kurt, 1978Įarlier onset of exercise-induced angina (HbCO 4.96%) (WHO 13 Typical concentration in flue gases (chimney) of a properly operating furnace or water heater. Vigilance decrement (HbCO 3.0) (World Health Org. Shortened time to angina response (HBCO 2.9) Impaired performance in time discrimination (HbCO 2.0)ĭecrease in absolute exercise time (HbCO 2.5) U-L standards for residential detectors require that they NOT alarm at 15 ppm unless exposure is continuous for 30 days. Typical concentration after operation of unvented gas kitchen range (Tsongas). Polluted cities often reach and exceed 9 ppm, increasing incidence of congestive heart failure (Morris). The maximum allowable concentration for 8-hour period in any year, EPA (ASHRAE). Source should be identified, might be normal (ie, traffic, kitchen range) (Energy Conservatory).
Raises questions about why CO is elevated. Might be normal, from cooking stoves, spillage, outdoor traffic Greiner, Extension Agricultural Engineerĭepartment of Agricultural and Biosystems Engineering, Iowa State University.Įffects, Inhalation Time and Toxic Symptoms Developed