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Contaminant concentration reduction: general ventilation versus local exhaust ventilation
American Industrial Hygiene Association Journal
|November 1, 1980
Summary
General ventilation, using four to ten air changes per hour, can reduce workplace contaminant concentrations. Cost-benefit analysis shows its potential as an alternative to local exhaust ventilation for improved air quality.
Area of Science:
- Industrial Hygiene
- Environmental Engineering
- Occupational Safety
Background:
- General ventilation is frequently suggested as a method to decrease workplace contaminant levels.
- Its effectiveness and cost-efficiency are compared against local exhaust ventilation systems.
Purpose of the Study:
- To evaluate the efficacy of general ventilation in reducing airborne contaminants.
- To compare the costs of general ventilation with local exhaust ventilation.
- To analyze the impact of general ventilation on dust counts.
Main Methods:
- Theoretical estimation of contaminant concentration reduction with 4 and 10 air changes per hour.
- Estimation of first and operating costs for general ventilation in a typical workplace.
- Comparative cost analysis between general and local exhaust ventilation.
- Analysis of general ventilation's effect versus local exhaust points on dust reduction.
Main Results:
- General ventilation theoretically reduces contaminant concentrations.
- Cost estimations provide a basis for economic comparison with local exhaust ventilation.
- The study analyzes the localized effects of general ventilation compared to plant-wide application.
Conclusions:
- General ventilation offers a potential strategy for contaminant control in workplaces.
- Economic viability is a key factor in choosing between general and local exhaust ventilation.
- Further analysis is needed on the specific impact of general ventilation on dust levels.