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(303) 366-1112

Allowable Exposure Levels to Carbon Monoxide

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Allowable Exposure Levels to Carbon Monoxide

Allowable (Legal) Limits for Carbon Monoxide

Occupational Safety & Health Administration, USA (OSHA) (for industrial situations) -

Permissible Exposure Limit (PEL, by TWA) - 50 ppm, 8 hrs.
Old PEL Standard (by TWA) - 35 ppm, 8 hrs.
Threshold Limit Value (TLV, by TWA) - 25 ppm (29 mg/cu. m)
(recommended by American Conference of Governmental & Industrial Hygienists ACGIH)
Ceiling (max. value, 15 min.) - 200 ppm (229 mg/cu. m)

MI Occupational Safety & Health Administration (MIOSHA) -

PEL (Industry, by TWA) - 35 ppm, 8 hrs. (38.5 mg/cu. m)
PEL (Construction, by TWA) - 50 ppm, 8 hrs. (55 mg/cu. m)
Ceiling (max. value) - 200 ppm (229 mg/cu. m)

Environmental Protection Agency, USA (EPA) -

Domestic, outdoor air, all ages (TWA) - 9 ppm*, 8 hrs.
Domestic, outdoor air, all ages (TWA) - 35 ppm, 1 hr.

World Health Organization (WHO) -

Domestic, outdoor air, all ages (TWA) - 9 ppm*, 8 hrs.

American Society of Heating, Refrigeration & Air Conditioning Engineers (ASHRAE) -

Indoor air (leakage at a heat register) - 9 ppm

American Gas Association -

Indoor air (leakage at a heat register) - 15 pm


TWA - Computed by making measurements at intervals over 8 hours, then adding the sums of the concentrations and the intervals, and dividing by 8 hours (480 min.). * Based on several published studies of people with coronary ischemic disease showing ECG changes during moderate exercise when breathing concentrations of CO giving 3% COHb.
 
trust our techs with your next Furnace repair in Lakewood CO
 
Coffman & Company B & F Heating & AC, Inc. | Phone: (303) 366-1112
 
Wheat Ridge, CO 80033 | Fax: (720) 890-2711 | info@coffmanco.com
Get your Trane Furnace units service done in Wheat Ridge CO by Coffman & Company
Coffman & Company participates in the Denver Energy Challenge.
For your Furnace repair in Wheat Ridge CO, trust a NATE certified contractor.
Coffman & Company B & F Heating & AC, Inc.
Phone: (303) 366-1112
 
Wheat Ridge, CO 80033 | Fax: (720) 890-2711
info@coffmanco.com
Trane Furnace service in Denver CO is our speciality.
Coffman & Company participates in the Denver Energy Challenge.
Coffman & Company works with NATE Furnace products in Lakewood CO.
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