Table of Contents
Wall Openings, Louvers, and
VentiMatic Shutter
Self-Contained Floor Models ARQ and GRQ are typically
installed in front of a wall opening containing a properly sized
louver that is designed to let in outside air while preventing
water (such as rain) from getting past the louver and into
the unit itself. A weather-tight seal keeps unwanted air and
moisture from entering the occupied space. Refer to Figure 7
through Figure 23, for louver details.
Figure 7: Horizontal and vertical blade louvers, without
flange, (see Caution below for louver blade orientation and
drainage)
Bird Screen On Side Toward Unit
Outside Air
Horizontal Blade Louver
Bird Screen On Side Toward Unit
Outside Air
Vertical Blade Louver
CAUTION
Locate Drain Lip at bottom of vertical louver to allow proper drain-
age. For horizontal louvers, the louver blades should face down for
proper drainage. Bird screen should always be on side toward unit.
www.DaikinApplied.com
Bottom
Figure 8: Horizontal and vertical blade louvers, without
flanges with grille or with flange without grille
Outside Air
Horizontal Louver
without Flange,
with Grille
Grille/Louver with weep hole
Rear of Horizontal Blade Louver with Birdscreens and Flange
VentiMatic™ Shutter Assembly
In many installations, a Daikin Applied VentiMatic Shutter
Assembly is specified. See Figure 9. This one-way shutter is a
continuously variable, gravity actuated, room exhaust vent that
operates in direct response to positive static pressure. It opposes
any airflow into the room and allows a slight positive pressure.
It is important that the VentiMatic shutter and unit ventilator
louvers are mounted on the same wall. This neutralizes the
effect of the wind. Forcing excess air into the room through the
unit ventilator louver overcomes the same wind pressure that
works to keep the VentiMatic shutter closed. This prevents room
air exhausting from the room through the VentiMatic shutter.
Figure 9: VentiMatic Shutter assembly
Outside
Louver
Note: Birdscreen and louver are shipped in one (1) piece.
9
Vertical Louver with Flange, without Grille
Louver drain lip
VentiMatic Shutter
Roomside
Relief Air
Flange
Flange
IM 1083-3
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