FloAire DMUA - Manual (Page 5)

5
Wall Mounting
1. The same instructions, warnings and notes found under Roof Mounting section will apply. Refer
to steps 2 and 3, and steps 5 through 8.
2. Masonry Wall: Around the wall opening install an angle iron frame at least 2” x2” x ¼”. Frame
should be approximately 1/2” smaller than the inside base dimension of the ventilator. Secure the
lead cinch type anchors with non-ferrous bolts (3 per side). The ventilator should be mounted to
the mounting angle with self-taping sheet metal screws (3 per side).
3. Wood Sidings: Around the wall opening install a wooden frame 2” high x 2” wide. Frame should
be approximately 1/2” smaller than the inside base dimension of the ventilator. Secure with
counter-sunk expansion type lag bolts (3 per side). The ventilator should then be mounted to the
mounting frame with the square head wood screws (3 per side) 3/8” minimum.
4. Steel wall mount brackets are also available as a factory option for the fan.
5. The mounting flange connections should be coated with a suitable caulking compound or an
approved waterproof mastic sealer.
6. Wall mount application is not recommended from fans with wheels 30” or larger.
IMPORTANT: OSHA REGULATIONS REQUIRE THE VENTILATOR TO BE MOUNTED AT LEAST
EIGHT (8) FEET ABOVE GROUND OR FLOOR LEVEL.
Curb and Ductwork
This fan was specified for a specific CFM and static pressure. The ductwork attached to this unit will
significantly affect the airflow performance. Flexible ductwork and square elbows should not be used.
Also, transitions and turns in ductwork near
the fan inlet will cause system effect and
will drastically increase the static pressure
and reduce airflow. Follow SMACNA
guides and recommendations for the
remaining duct run. Fans designed for
rooftop installation should be installed on a
prefabricated or factory built roof curb.
Follow curb manufacturer’s instructions for
proper curb installation. Curbs should be
connected to structural roof members with
at least four (3) lug screws, anchor bolts, or
other suitable fasteners (not furnished) per
curb flange. Curb flanges should be
caulked to roof.
The fan should be installed on a curb and/or
rail elevated not less than 14” above any surface. Be sure duct connection and fan outlet are properly
aligned and sealed. Secure fan to curb through vertical portion of the ventilator base assembly flange
using a minimum of eight (8) lug screws, anchor bolts, or other suitable fasteners (not furnished). Shims
may be required depending upon curb installation and roofing material. Check all fasteners for tightness.
The diagrams below show different mechanical installation configurations.