Filter Fan Plus
FPI/FPO 018 | up to 68.9 cfm (4.9 x 4.9")

  • New air-flap outlet technology for high airflow
  • Easy mounting
  • Protection type/Environmental ratings by independent testing agencies (VDE & UL)
  • Two optional systems for optimal airflow (FPI/FPO)
  • Industry-common enclosure cut-out sizes (5 sizes)
  • Single filter mat system design

Filter fans are used to provide "cooling" by forced air-circulation in enclosures and cabinets containing electrical/electronic and other components. The interior temperature of an enclosure can be reduced by channeling cooler, filtered outside air into the enclosure, thus expelling hot inside air. The resulting airflow prevents formation of localized hot pockets and protects electronic components from overheating.

The Filter Fan Plus series encompasses a new air-flap technology on the air outlet side, thereby reaching an unparalleled high degree of airflow. A unique ratchet mechanism is used for easy installation. It provides safe and secure mounting while guaranteeing a tight seal. Depending on the requirements, there are two optional systems available – the FPI or the FPO system (FPI = "in", FPO = "out"). The FPI system is the more commonly known installation system, where a filter fan located in the lower part of the enclosure draws cleaner, cooler air into the enclosure (airflow direction "In"). This system consists of a filter fan and exhaust filter. On opposite, with the newer FPO system, the filter fan will be located in the upper area of the enclosure to draw warmer air out of the enclosure (airflow direction "Out"). The FPO system consists of an intake filter and exhaust filter fan. The Filter Fan Plus series may also be used outdoors with appropriate protective measures or when equipped with weather proof accessories, e.g. Hose-proof Hood FFH 086.

Axial fan, ball bearingservice life L10 at +104 °F (+40 °C): min. 37,000 h
fan body aluminum, metal impeller
Connection2 stranded wires, 11.8" (300 mm) long
Housing, hood, flapsplastic UL 94V-0, light grey;
UV light resistant according to UL746C (f1)
Enclosure cut-out4.9 x 4.9+0.04 inches (124 x 124+1 mm)
Mounting frame4 built-in ratchet push levers for mounting
(6 ratchet stops to accommodate for wall
thicknesses Gauge 9 to 19 or 1-4 mm).
Additional screw mounting possible if needed1.
Filter matISO coarse 55% acc. to ISO 16890 (G3), init. grav. arrestance 57%
Filter materialsynthetic mesh with progressive construction, temperature
resistant to 212 °F (100 °C), self-extinguishing class F1,
moisture resistant to 100 % RH, reusable
Operating/Storage temperature-40 to +158 °F (-40 to +70 °C)
Operating/Storage humiditymax. 90 % RH (non-condensing)
Protection type/Protection class     IP54 / I (grounded)
Environmental rating UL/NEMAUL TYPE 12 / NEMA 12
ApprovalsVDE, UL File No. E234324, EAC
Noteother voltages on request

1 Drilling hole markings for screw mounting are indicated on mounting frame.

Airflow direction "In": Filter Fan FPI 018

Part No.Operating voltageAir volume,
free blowing
Air volume
with exhaust filter
(50/60 Hz)
Average noise level
(DIN EN ISO 4871)
Mounting depthWeight
Filter mat
01871.0-30AC 230 V, 50/60 Hz30.6 cfm (52 m³/h)24.7 cfm (42 m³/h)120 mA19 W49 dB (A)2.6" (66 mm)1.8 lbs. (0.8 kg)G3
01871.9-30AC 115 V, 50/60 Hz36.5 cfm (62 m³/h)30.0 cfm (51 m³/h)230 mA18 W53 dB (A)2.6" (66 mm)1.8 lbs. (0.8 kg)G3

Airflow direction "In": Exhaust Filter FPI 118

Part No.Mounting depthWeight (approx.)Air outlet
11871.0-001.4" (35 mm)0.7 lbs. (0.3 kg)air-flap outlet technology

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Airflow direction "Out": Filter Fan FPO 018

Part No.Operating
Air volume,
free blowing
Air volume
with intake filter
(50/60 Hz)
Average noise level
(DIN EN ISO 4871)
Air outlet
01881.0-00AC 230 V, 50/60 Hz57.1 cfm (97 m³/h)27.7 cfm (47 m³/h)120 mA19 W49 dB (A)3.1" (79 mm)2.0 lbs. (0.9 kg)air-flaps
01881.9-00AC 115 V, 50/60 Hz68.9 cfm (117 m³/h)34.1 cfm (58 m³/h)230 mA18 W52 dB (A)3.1" (79 mm)2.0 lbs. (0.9 kg)air-flaps

Airflow direction "Out": Intake Filter FPO 118

Part No.Mounting depthWeight (approx.)Filter mat
11881.0-300.9" (22 mm)

0.4 lbs. (0.2 kg)

ISO coarse 55% acc. to ISO 16890 (G3), initial gravimetric arrestance 57%

Filter Mat FM 086

Filter class4.65 x 4.65" (118 x 118 mm)Initial gravimetric arrestance1 packing unit
ISO coarse 55% acc. to ISO 16890 (G3)Part No. 08634.0-0057 %5 pieces

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Dimensioned Drawing

FPI 018/FPI 118
FPO 018/FPO 118