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Choose AStar for your AC repair service in Middletown NY!
We repair most models of Air Conditioner units in Goshen NY.
(845) 692-4858
36 Wes Warren Dr. Middletown, NY 10941
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For your Plumbing repair in Goshen NY call AStar!
(845) 692-4858

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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Our Affiliations
For Plumbing repair in Goshen NY, choose a Readers' Choice Winner!For providing Air Conditioner maintenance to Middletown NY, we are a Super Service Award winner!Choose a BPI certified contractor for your Cooling repair in Goshen NY.For Air Conditioning repair service in Goshen NY, call Astar Heating & A/C, Inc..See what your neighbors say about their recent Air Conditioning repair in Middletown NY on Google!
Astar Heating & A/C, Inc. • 36 Wes Warren Dr. Middletown, NY  10941 • (845) 692-4858