Why is an extra negative air unit added in the plan?

Why is an extra negative air unit added in the plan?

• A. To speed up cleanup
• B. To provide redundancy
• C. To reduce noise
• D. To save energy

Answer: (B)

Having an extra negative air unit is about providing redundancy in containment. Negative air units create a stronger pull that keeps asbestos-containing dust from migrating to surrounding areas. If one unit fails, a second unit keeps the work zone at the required negative pressure, so containment isn’t lost during maintenance, filter changes, power interruptions, or other interruptions. This safeguards workers and nearby areas and helps meet regulatory requirements for maintaining proper pressure differentials and air changes. The other options don’t address containment reliability—speeding cleanup, reducing noise, or saving energy aren’t the primary concerns in this context.

Having an extra negative air unit is about providing redundancy in containment. Negative air units create a stronger pull that keeps asbestos-containing dust from migrating to surrounding areas. If one unit fails, a second unit keeps the work zone at the required negative pressure, so containment isn’t lost during maintenance, filter changes, power interruptions, or other interruptions. This safeguards workers and nearby areas and helps meet regulatory requirements for maintaining proper pressure differentials and air changes. The other options don’t address containment reliability—speeding cleanup, reducing noise, or saving energy aren’t the primary concerns in this context.