Office: (248) 471-3110  |  For Parts: (800) 466-3110
Office: (248) 471-3110
For Parts: (800) 466-3110
 
 
Hartford & Ratliff Co., Inc.

Allowable Exposure Levels to Carbon Monoxide

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.
Call Us Today • (248) 471-3110 • or • Fill Out Our Online Form
24/7 Emergency Service Available
Call Us Today • (248) 471-3110
• or •   Fill Out Our Online Form
24/7 Emergency Service
 
 
Contact Info
 
Address:  32708 W. 8 Mile Rd.
Farmington, MI 48336
Toll Free:  (800) 466-3110
Monday - Friday  |  8:00am - 5:00pm
24 hour emergency service • 7 days a week
Schedule an Appointment
 
Payment Options
 
For AC in Farmington MI, we accept most major credit cards.
 
We accept check for Air Conditioner repair service provided in Novi MI.
We accept cash for Cooling repair service provided in Farmington MI.
 
We accept all major credit cards, cash and personal checks. We also have several financing options available through Payzer financial.

 
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To schedule your Air Conditioner installation in Farmington MI, just email us!
Looking for Air Conditioner repair service in Novi MI? - Check out our YouTube channel.
Looking for Air Conditioner repair service in Novi MI? - Check out our YouTube channel.
 
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Home   |   Email Us   |   Schedule Service
Get a Quote   |   Maintenance   |   Guarantees
Employment   |   Tax Credits   |   Search Site
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