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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.
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Contact Information
 
Address:    8701 125th Ave. Stanwood MI 49346
Phone:  (616) 696-2866
Hours of Operation
24/7 Emergency Service With No Extra Charge, All Day Everyday
Connect With Us
 
For Boiler repair in Cedar Springs MI, like us on Facebook!
For Furnace repair in Stanwood MI, visit us on Google!
Leave us a review on Yelp about your Water Heater replacement in Stanwood MI.
 
Payment Options
For Furnace in Cedar Springs MI, we accept most major credit cards.
We accept cash for Heating repair service provided in Grand Rapids MI.
We accept check for Boiler repair service provided in Stanwood MI.
Send Us a Message
 
Contact Information
 
Address:    8701 125th Ave.
 Stanwood MI 49346
Phone:  (616) 696-2866
Hours of Operation
24/7 Emergency Service With No Extra Charge,
All Day Everyday
Connect With Us
 
For Boiler repair in Cedar Springs MI, like us on Facebook!
For Furnace repair in Stanwood MI, visit us on Google!
Leave us a review on Yelp about your Water Heater replacement in Stanwood MI.
 
Payment Options
For Furnace in Cedar Springs MI, we accept most major credit cards.
We accept cash for Heating repair service provided in Grand Rapids MI.
We accept check for Boiler repair service provided in Stanwood MI.
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