What filtration efficiency is expected for supply air unless HEPA filtration is required?

What filtration efficiency is expected for supply air unless HEPA filtration is required?

• A. 50-60% efficiency.
• B. 85-95% efficiency.
• C. 99.97% efficiency.
• D. 75-80% efficiency.

Answer: (B)

The expected filtration level for supply air without requiring HEPA is a high-efficiency, non-HEPA filter that cleans most of the particulate matter entering the space. In practice, well-designed systems use filters that remove a large majority of fine particles, typically in the 85–95% range. This level provides strong air quality benefits for animal rooms without the additional pressure drop and cost of HEPA filters. Why this range fits: it captures most fine particles that can affect animal health and facility cleanliness while remaining practical for standard HVAC equipment. Lower ranges, like 50–60% or 75–80%, would let more contaminants through and wouldn't meet the standard for good IAQ in many animal-care settings. A 99.97% efficiency corresponds to HEPA filtration, which is only required in specific cases, not as a baseline for supply air.

The expected filtration level for supply air without requiring HEPA is a high-efficiency, non-HEPA filter that cleans most of the particulate matter entering the space. In practice, well-designed systems use filters that remove a large majority of fine particles, typically in the 85–95% range. This level provides strong air quality benefits for animal rooms without the additional pressure drop and cost of HEPA filters.

Why this range fits: it captures most fine particles that can affect animal health and facility cleanliness while remaining practical for standard HVAC equipment. Lower ranges, like 50–60% or 75–80%, would let more contaminants through and wouldn't meet the standard for good IAQ in many animal-care settings. A 99.97% efficiency corresponds to HEPA filtration, which is only required in specific cases, not as a baseline for supply air.