How does indoor ventilation affect the duration and intensity of OC spray effects?

• A. Better ventilation reduces concentration and duration of exposure; poor ventilation prolongs symptoms.
• B. Ventilation has no effect on OC spray effects.
• C. Ventilation only affects outdoor dispersion.
• D. The duration is determined solely by spray potency.

Answer: (A)

Indoor air movement directly changes how much OC spray is present in the air you breathe and how long it stays there. Good ventilation dilutes the spray and removes particles more quickly, lowering the inhaled dose and helping eyes and airways recover faster. Poor ventilation lets the irritant linger and accumulate, so exposure remains higher for longer and symptoms can be more intense. That’s why better ventilation reduces both the concentration and the duration of effects, while poor ventilation tends to prolong them. The other ideas miss how air flow changes the actual amount you’re exposed to and how long it remains in the space—concentration and duration aren’t governed by potency alone or by outdoor dispersion alone.