FFX2, 4", ST, FILTER INTAKE
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The RESPA-FFX2 is a high efficiency recirculation filtration system, designed to complement our powered fresh air system, the RESPA-CF2. Together, these two components create a highly effective Cab Air Quality System, which includes all controls specified by the U.S. Occupational Safety and Health Administration (OSHA) silica regulation. Additionally, the two components satisfy the Best Practice Recommendations of the International Society of Environmental Enclosure Engineers (ISEEE) for high efficiency fresh and recirculated air filtration.
RESPA-FFX2 is recommended when you can plumb into the HVAC mixing plenum. If you cannot plumb the recirculation air into the plenum, use the powered RESPA-CFX instead.