Crowther Heating & Air Conditioning, Inc., ready to service your Heater in Kilmarnock VA
(800) 323-7478
Crowther Heating & Air Conditioning, Inc., ready to service your Heater in Kilmarnock VA

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.
 
Company Locations
 
Address:     503 North Main Street
Kilmarnock, VA 22482
Phone:         (804) 435-1141
Toll Free:      (800) 323-7478
Connect With Us
 
For Furnace repair in Kilmarnock VA, like us on Facebook!
For Heater repair in Kilmarnock VA, visit us on Google!
Email us any questions about our Heater repair service in Kilmarnock VA
 
Get In Touch
 
Send Us an Email
Summer Business Hours
 
Monday - Friday:   8:00am - 5:00pm
Saturday:   Closed
Sunday: Closed
24 Hour Emergency Service