What type of filter is required for exhaust from the device providing negative pressure?

The correct answer for the type of filter required for exhaust from a device providing negative pressure is HEPA. HEPA stands for High Efficiency Particulate Air. These filters are designed to trap extremely small particles, demonstrating 99.97% efficiency at capturing particles as small as 0.3 microns. This is particularly important in mold remediation and other environments where airborne contaminants, including mold spores, must be controlled to maintain a safe environment.

Using a HEPA filter in a negative pressure system helps ensure that any contaminants that may be disturbed during the remediation process do not escape back into the general environment. This is key in preventing the spread of mold spores and other harmful particles.

While carbon filters are effective for removing odors and certain gases, they lack the ability to filter out particulate matter to the same extent as HEPA filters. Mechanical filters may be less efficient for capturing fine particulates, and biofilters are typically used for managing biological odors in a different context, rather than for fine particulate containment. Thus, HEPA filters are the optimal choice for ensuring clean exhaust in mold remediation settings.