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The all-new Pro Cirrus HVAC Airflow Indicator is the best global airflow indicator on the market. Our new Pro Cirrus HVAC Airflow Indicator is hospital safe and is ideal for negative pressure rooms. It's a truly safe replacement for traditional candlewick, puff bottles, and smoke pellet systems. The Pro Cirrus HVAC Airflow Indicator is trusted by HVAC professionals, mechanical technicians, and hospital staff.
