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Pharmaceutical-Style Fan Filter Units

Somtimes referred to as Roomside Replaceable Fan Filter Units

Pharmaceutical-Style fan filter units are ideal for pharmaceutical companies, manufacturers of medical devices and companies in highly regulated industries. They units feature a gel channel on the upstream side of the final filter which provides a leak-free seal between the filter and the housing.

Pharmaceutical-Style units feature a HEPA or ULPA filter replaceable from roomside while the filter housing remains in place. Housings are fabricated from steel with a white powder coat finish and include seismic clip suspension points. A polystyrene eggcrate grille in an anodized aluminum frame is hinged to open, permitting removal of the filter without removing the unit from the ceiling. Optional perforated stainless steel or aluminum grilles are available.

The energy efficient N310 motor blower is a low watt backward curved impeller, single phase, permanent split capacitor type motor blower assembly with thermal overload protection. Units are available in 115V (60 Hz), 208-230V (50/60 Hz) and 277V (60 Hz).

Pharmaceutical-Style Fan Filter UnitsThe Fan Filter Units include a 99.99% efficient HEPA filter, 30% ASHRAE pleated type prefilter, seismic clip suspension points, safety switch which disables the unit while servicing, and solid state variable speed control with RFI suppression, allowing the airflow to be fine tuned.

The final filters are protected with a white epoxy diamond pattern grille and are tested according to accepted procedures as described by the Institute of Environmental Sciences (IEST) and/or ISO standards. The standard HEPA filter is 99.99% eff. and an ULPA grade 99.9995% eff. filter is available as an option.

Other popular options include an 8 power cord (110 Volt only), 99.9995% eff. ULPA grade final filter, UL 900 Class 1 filters and duct collar adapters.


  • Pharmaceutical-Style Filter Data: The HEPA Filter is designed for 90 FPM average face velocity @ initial 0.47 w.g. and has a rated efficiency of 99.99% @ 0.3 micron or larger. An anodized aluminum frame holds the 53mm media which is protected by a diamond pattern white epoxy coated steel grille. Final filters are replaceable from roomside.
  • Access Port: This port is located in the center of the filter element face and is used for introducing an upstream challenge or measuring static pressure.
  • Standard Ceiling Size: All 2' x 4' models are designed to fit a nominal 2' x 4' ceiling grid with a 22.5" x 46.5" standard opening.
  • Air Flow: Airflow ranges from 340 to 640 CFM for a 2' x 4' unit and 220 to 340 CFM for a 2' x 2' unit. At 90 FPM, CFM is nominal 510 on a 2' x 4' and 220 on a 2' x 2' unit respectively. Airflow for units running at 50 Hz will be about 20% less.
  • Sound Level: At average face velocity of 90 FPM measured 30 from face of filter, sound level is approximately 54 dba with less than 45 dba ambient sound level. Field conditions, voltage and method of testing could produce different results.

Ordering Information
Product Code Model Size Voltage Motor  
12800* SAM 22 MS GS 2' x 2' 115V N310 Buy Online
12802* SAM 22 MS GS 2' x 2' 277V N310 Buy Online
12805* SAM 24 MS GS 2' x 4' 115V N310 Buy Online
12807* SAM 24 MS GS 2' x 4' 277V N310 Buy Online
*UL Listed