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Corrosion Resistant Wall & Remote Mount NFPA 496 Building Pressurization Units

Model WDP & RDP
Wall & Remote Mount NFPA 496
Building Pressurization Units

Unit Configurations

explosion-proof building pressurization units, hazardous location building pressurization units, classified area explosion proof building pressurization units

Bebco produces Model WDP Wall Mount and RDP Remote Mount Whisper Drive™ Units to provide a wide range of building pressurization solutions that are UL Classified to meet all requirements for Class I, Division 1 and 2, Group C and D Hazardous Locations.

Model WDP Whisper Drive™ Units mount through a framed cutout in the exterior wall of the room or building to be pressurized. They feature primary and secondary fans, along with pre-wired controls, to simplify installation, and only requires wiring to a power source, an alarm system and optional remote control switches to become fully operational.

Model RDP Whisper Drive™ Units may be mounted on an exterior wall or roof and feature primary and secondary fans, along with pre-wired disconnect switches. A Remote Control Station ships separately, for interior or exterior wall mounting. Installation requires atmosphere or room pressure reference tubing, and motor power wiring between the RDP Housing and Remote Control Station enclosure, for wiring to a power source, an alarm system and optional remote control switches.

As further detailed below, these configurations provide a complete but versatile stand-alone solution for pressurization. Please contact a Bebco Sales Associate if you have any questions regarding which configuration may be best suited for your particular application.


Bebco Model WDP & RDP Whisper Drive™ Units
are offered in two easily serviced designs!


Click images below to learn more!


•  Wall Mount Dual Fan Building Pressurization Units
Bebco Model WDP Units feature a seal-welded housing that features two
fan assemblies, one pressure gauge, one electronic control system, a
screw fastened control enclosure cover, a full size rear door, a high
memory replaceable gasket, pinned hinges and hex Allen wrench
latches, a discharge grille with washable filter and three intake air
stack ports with covers, one each on the sides and top of the unit.

The housing must be installed in the vertical position as shown, and
includes one seal-welded interior trim bezel that is attached by screws
into pre-drilled and tapped holes in the housing. Four miter-cut angle
flange brackets are provided for the exterior side of the housing.
They are secured by drilling and tapping holes in the housing
and wall surface, which may range up to eight (8) inches thick.

Installation is completed by routing conduit or rated cabling from
a power source, alarm system and optional remote control switches
to junction box hubs at the bottom outer corners of the housing.

WDP Units are available in the following Model sizes and ratings:


WDP-12: 21 Square Feet Openings, Maximum

WDP-16: 31 Square Feet Openings, Maximum

WDP-20: 55 Square Feet Openings, Maximum

WDP-24: 75 Square Feet Openings, Maximum




IMPORTANT NOTES:
Model ratings above and below represent the maximum permissible area of
all "openings capable of being opened", in accordance with NFPA Code 496.

Typically, most pressurized buildings and rooms only feature doors, but
operable windows and other similar items must also be considered with
exception only to equipment access doors that are properly labeled and
sealed during normal operations. In addition, the integrity of all doorway
gaskets and other factors of building construction may affect the unit's
performance. Please ask a Bebco Sales Associate for more information
regarding these critical aspects that affect proper unit size selection.




 Remote Mount Dual Fan Building Pressurization Units
Bebco Model RDP Units feature a seal-welded housing that features two fan
assemblies pre-wired to two separate disconnect switches, a full size door
with a one-piece high memory replaceable gasket, pinned hinges and hex
Allen wrench operated latches, a flanged discharge opening, and three
intake air stack ports with covers, one each on the opposite end and
sides of the unit.

The housing may be installed in any position and is furnished with four
vibration isolators. The isolators are provided to mount the housing
in a preferred location by drilling through bolt or tapped holes as
required to secure the unit firmly to a remote frame, exterior wall
or roof surface. Ducting is then required to connect the Unit's
discharge to an HVAC Unit make-up air inlet or directly to the
room or building to be pressurized.

The Remote Control Station mounts on any interior or exterior wall
and requires conduit or rated cabling routed from the disconnect
switches, a power source, an alarm system and optional remote
control switches. Installation is completed with a tube connecting
the room pressure indicator to atmosphere or room
pressure.

RDP Units are available in the following Model sizes and ratings:


RDP-12: 21 Square Feet Openings, Maximum

RDP-16: 31 Square Feet Openings, Maximum

RDP-20: 55 Square Feet Openings, Maximum

RDP-24: 75 Square Feet Openings, Maximum

Bebco Whisper Drive™ Model WDP Wall Mount Building Pressurization Unit Housing

Model WDP Wall Mount Unit
Bebco Whisper Drive™ Model WDP Wall Mount Building Pressurization Unit Controls Bebco Whisper Drive™ Model WDP Wall Mount Building Pressurization Unit Interior Trim Bezel Bebco Whisper Drive™ Model WDP Wall Mount Building Pressurization Unit Discharge Grill. Bebco Whisper Drive™ Model WDP Wall Mount Building Pressurization Unit Secondary Fan Bebco Whisper Drive™ Model WDP Wall Mount Building Pressurization Unit Rear Doors












Bebco Whisper Drive™ Model RDP Wall Mount Building Pressurization Units

Model RDP Remote Mount Unit
Bebco Whisper Drive™ Model RDP Remote Mount Building Pressurization Unit Installation

Bebco's Model WDP & RDP Whisper Drive™ Units are sleek American made products that are
UL Classified to pressurize control rooms, motor control centers and laboratories in accordance with NFPA 496!



Bebco Environmental Controls Corporation
Physical Address: 4725 Lawndale Street, La Marque, Texas 77568
Mailing Address: P.O. Box 68 Hitchcock, Texas 77563
Phone: (844) 397-4822     |   Fax: (409) 935-5819
Office Hours:
 8 AM to 5 PM CST, Monday - Friday
Please visit this site for NFPA 496 UL Classified Enclosure Purging Systems:
Best Purging Systems Corporation

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