CASE STUDY: HVAC FREON LEAKS - ACID GAS EXPOSURE Project Description: IAQ Investigation for Acute Upper Respiratory Irritation at Banking Facility. Scope of Services: AET was contracted to evaluate complaints of periodic upper respirator tract irritation including coughing and burning eyes/throat at a bank branch facility. Complaints occurred in the summer during high outdoor temperatures and maximum air conditioner use. The facility was a s

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