How does the PuriFresh Clean Room differ from the PuriFresh Heat Recovery Ventilator and HEPA Filter?
As discussed in Question 1, above, the PuriFresh Clean Room does not perform heat or moisture recovery. It does positively pressurize the room with true HEPA filtered air while the PuriFresh HRV/ HEPA Filter does not. The HEPA filter on the Clean Room is a single-pass true-HEPA filter. The HEPA filters on the PuriFresh HRV/ HEPA Filter are not single pass. You can expect a very small amount of outside air to bypass the true-HEPA filter medium and enter the room unfiltered.
