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Carbon Monoxide in the Workplace

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CARBON MONOXIDE IN THE WORKPLACE 17 365-BSA-01-IMOT © 2024, Workplace Safety & Prevention Services (WSPS) 1 877 494 WSPS (9777) | 905 614 1400 | WSPS.CA Table 5: Comparison of Dilution and Local Exhaust Ventilation DILUTION VENTILATION Advantages: 1. Low equipment and installation costs. 2. Effective control for small amounts of low and medium toxicity solvents. 3. Effective control for flammable and combustible gases and vapours. 4. Requires little maintenance. Disadvantages: 1. Does not eliminate exposure to contaminated air. 2. Should not be used for high toxicity gases and vapours. 3. Should not be used for large amounts of any gases or vapours. 4. Ineffective for particulates (dusts, metal particles, fumes). 5. Requires large volumes of heated or cooled make up air. 6. Not effective for handling surges of gases or vapours or irregular emissions. 7. People working close to contaminants can still have large exposures. LOCAL EXHAUST VENTILATION Advantages: 1. Captures contaminants at source and removes them from the workplace. 2. Can handle all types of contaminants including dusts and fumes. 3. Requires small amounts of make up air since it exhausts low volumes of air. 4. Low ongoing energy costs because of low amounts of make up air. 5. Only alternative for highly toxic airborne materials. Disadvantages: 1. System design and installation can be expensive. 2. Requires regular cleaning, inspection and maintenance. WSPS.CA

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