Heating & Cooling
 

Allowable Exposure Levels to Carbon Monoxide

 
 
Heating & Cooling
 

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.
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Contact Information
 
Address:  303 S. Water Street
Bay City, MI 48708
Phone:  989.895.8569
Hours:  Mon - Thur:  |  8:00am - 5:00pm
Fri:  |  8:00am - 4:00pm
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For Air Conditioning in Bay City MI, we accept most major credit cards.
 
We accept check for Air Conditioner repair service provided in Bay City MI.
We accept cash for Cooling repair service provided in Bay City MI.
 
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Home   |   Email Us   |   Schedule Service
Get a Quote   |   Maintenance   |   Ask a Tech
Employment   |   Search Site
For Air Conditioning in Bay City MI, we accept most major credit cards.
We accept check for Air Conditioner repair service provided in Bay City MI.
We accept cash for Cooling repair service provided in Bay City MI.