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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Call Santiam Heating & Sheetmetal, Inc. for great Gas Furnace repair service in Salem OR
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Read what your neighbors say about the Gas Furnace repair or installation we performed near Salem OR on Yelp!
Contact Info
Contact Info
 
41713 Stayton Scio Rd. • Stayton, OR 97383
503.769.8483
503.769.8554
service@santiamheating.com
CCB# 104080
Connect With Us
 
For Gas Furnace repair in Salem OR, like us on Facebook!
For Gas Furnace repair in Sublimity OR, visit us on Google!
Schedule a Ductless Heat Pump repair service in Salem OR
Looking for Furnace repair service in Sublimity OR? - Check out our YouTube channel.
Read what your neighbors say about the Gas Furnace repair or installation we performed near Salem OR on Yelp!
 
 
Like us on facebook for more info on our Gas Furnace repair service in Salem OR
For Gas Furnace repair service in Salem OR, find us on Google!
Call Santiam Heating & Sheetmetal, Inc. for great Gas Furnace repair service in Salem OR
Check out our Ductless Heat Pump repair videos on Youtube for Sublimity OR
Read what your neighbors say about the Gas Furnace repair or installation we performed near Salem OR on Yelp!
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