50 years of experience and knowledge




The Design-Aire SL-RSR takes our slim line fan-filter unit to the next level of convenience by replacing the standard HEPA filter with a Room Side Replaceable HEPA filter. Room Side Replaceable filters are most desirable for clean rooms where there is limited or no ceiling access after installation. In addition to easy filter replacement, the Design-Aire SL-RSR also allows access to the electrical components of the unit from within the clean room for easy servicing.


  • Room Side Replacement
    No need to remove these units from the ceiling for servicing or filter changes.
  • Easy Installation
    The 12.5” height and light-weight housing of these units make them easier to slide into ceilings. The 3-prong electrical cord allows them to be plugged into standard 115V outlets.
  • HEPA Duration
    The variable speed control helps increase HEPA filter life by allowing the motor speed to be increased as the loading on the filter increases.
  • Energy Costs
    Uses a maximum of 2.16 amps on 4' units.
  • Convenient Connections
    A 115V duplex electrical outlet located in the filter housing allows up to 5 units to be connected to and run from one 15 amp circuit.


  • Gel seal, room side replaceable, High Efficiency Particulate Air (HEPA) filter rated 99.99% efficient at 0.3 microns
  • Uniform airflow across filter face
  • Durable, light-weight aluminum housing
  • Variable speed control, supplied loose with module not installed
  • Disposable, quick-change pre-filters, rated MERV 7
  • Less then 64dba noise levels
  • Duplex electrical outlet, 15A, 115V
  • 15' power cord, 115V – no hard wiring required
  • Sizes: nominal 2’x2’, 2’x3’ and 2’x4’
  • 2 Year Limited Warranty


  • Painted Aluminum or Stainless Steel housings
  • Ultra Low Penetration Air (ULPA) filter rated 99.9995% efficient at 0.12 microns
  • HVAC collar connections
  • 2" pleated pre-filter in place of standard 1"
  • Minihelic Gauge, to monitor filter loading
  • Sound Insulation Package
  • Suspension Package
  • Drywall Installation Flange
  • Factory install of speed control 
  • NEW: 230V export option is now RoHS compliant
  • Remote aerosol injection system