Fan Filter Units

MicroSound 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 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 115 Volt (60 Hz), 208-230 Volt (50/60 Hz) (Upon Request) and 277 Volt (60 Hz).

Housings are fabricated from steel with a white powder coat finish and include seismic clip suspension points. 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 HEPA Filters are designed for 90 FPM average face velocity @ initial 0.47 w.g. and have a rated efficiency of 99.99% @ 0.3 micron or larger. A 99.9995% eff. ULPA filter is available as an option. An anodized aluminum frame holds the 53mm media which is protected by a diamond pattern white epoxy coated steel grille. Final filters can be replaced by removing unit from ceiling.

Specifications:

MicroSound NCR style models are low profile, measuring 12.625" high.

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.

Airflow ranges from 400 to 750 CFM for a 2' x 4' unit and 250 to 400 CFM for a 2' x 2' unit. At 90 FPM, CFM is nominal 632 on a 2' x 4' and 300 on a 2' x 2' unit respectively. Airflow for units running at 50 Hz will be about 20% less.

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.

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Fan Filter Units for Special Applications

Pharmaceutical Style

Room-side replaceable 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.

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Constant Output

Constant output fan filter units use an electronically commutative motor that is programmed to increase the speed with load demand to maintain a constant airflow.

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Energy Saving

Energy saving fan filter units feature a 3-speed switch, and provide quiet performance and energy efficiency while delivering 90 FPM airflow velocities.

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High Output

High output fan filter units are designed to deliver between 1,000 and 1,200 CFM, making them ideal for cleanroom applications with high ceilings.

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Stainless Steel

These fan filter units feature housings fabricated from type 304 stainless steel. Final filters are protected by a stainless steel perforated grille downstream.

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Hazardous Location

These fan filter units supply clean air to workstations or equipment in locations where ambient air is contaminated with chemicals, or other hazardous conditions.

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Reverse Flow

Used when negative pressure is required, reverse flow pulls air out of a cleanroom, clean bench, or enclosure, and vents it outside of the environment.

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Recommended Fan Filter Unit Configurations
Nominal Dimensions No. of Ceiling Bays No. of Filter Modules to meet Fed Std 209 Class Standards
1 10 100 1,000 10,000 100,000
8' x 8' 8 5 - 8 4 - 8 3 - 6 2 - 3 1 - 2 1
8' x 12' 12 7 - 12 6 - 12 4 - 8 3 - 5 2 - 3 1 - 2
8' x 16' 16 10 - 16 8 - 16 6 - 11 4 - 6 2 - 4 1 - 3
12' x 12' 18 11 - 18 9 - 18 6 - 13 5 - 7 3 - 5 1 - 3
12' x 16' 24 14 - 24 12 - 24 8 - 17 6 - 10 4 - 6 2 - 4
16' x 16' 32 19 - 32 16 - 32 11 - 22 8 - 13 5 - 8 2 - 5
20' x 20' 50 30 - 50 25 - 50 18 - 35 13 - 20 8 - 13 3 - 8
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