NOTE: Delete this paragraph if make-up air to the
hood is to be provided separately from the exhaust
hood. Many hood manufacturers provide an integral
make-up air system as part of their hood design.
**************************************************************************
Hood shall be provided with an integral make-up air system which
automatically replaces the air volume that is exhausted by the hood. The
make-up air system shall be in accordance with NFPA 96. Air supplied
upstream of the hood suction opening does not qualify as make-up air. The
exhaust air flow rate for ventilation of cooking equipment shall be drawn
through the open area between cooking surfaces and the perimeter entrance
of the hood. Make-up air diffusers shall be provided at the front panel
and at the exterior length of the hood producing a low velocity discharge.
The supply air plenum shall have a 25 mm 1 inch thick foil-faced fiberglass
insulation at the interior of the plenum. The temperature differential
between the make-up air and the air in the conditioned space shall not
exceed 5 degrees C 10 degrees F, except for air that is part of the
air-conditioning system or air that does not decrease comfort conditions of
the occupied space.
2.7.4
Hood Lights and Wiring
Fixtures shall be U.L. Listed, recessed mounted, vapor proof fluorescent
fixtures located along the full length of hood. The light fixtures shall be
prewired to junction box on top of the hood. Regular or deluxe cool-white
T-8 energy efficient fluorescent lamps shall be supplied. Hoods shall be
factory prewired and shall have a single connection point. Hoods built in
multiple sections shall be furnished with inter-connecting junction boxes
for field connection of light fixtures.
2.7.5
Closure Panels
Vertical corner mullions, at removable closure panels, shall be 50 by 50 mm
2 by 2 inch wide, 1.6 mm (16 gauge) 16 gauge stainless steel, and shall be
welded integrally to the furring and head channel. Exhaust hood closure
panels shall be 13 mm 1/2 inch pan-formed, 1.3 mm (18 gauge) 18 gauge
stainless steel. Upper edge of panels shall be retained in 25 by 50 mm 1
by 2 inch continuous 1.6 mm (16 gauge) 16 gauge stainless steel head
channel secured to the hood superstructure. Lower edge of panels shall be
mounted on perimeter furring cap, and shall be turned back 25 mm 1 inch and
flanged up 25 mm 1 inch for "zee" clip retention.
2.7.6
Wall Panels
Double pan-formed wall panels shall be 1.3 mm (18 gauge) 18 gauge stainless
steel, 13 mm 1/2 inch thick with internal stiffener members. The panels
shall be filled with a "USDA Approved" thermal insulation the full height
and width of panels, and shall be attached to the interior with mastic.
Maximum allowable temperature at rear side of panel shall be 49 degrees C
120 degrees F. Lower edge and sides shall be leveled and squared. Panels
shall have butt joints.
2.7.7
Hand Held Fire Extinguishers
Hand held fire extinguishers shall be located at each exhaust hood and
shall be suitable for gas, electric, and grease fires.
SECTION 11400A
Page 27
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