Nfpa 96 2004
7.8.2.1 Rooftop terminations shall be arranged with or provided
with the following:
(1) Aminimum of 3.05m(10 ft) of horizontal clearance from
the outlet to adjacent buildings, property lines, and air
intakes
(2) A minimum of 1.5 m (5 ft) of horizontal clearance from
the outlet (fan housing) to any combustible structure
(3) A vertical separation of 0.92 m (3 ft) below any exhaust
outlets for air intakes within 3.05 m (10 ft) of the exhaust
outlet
(4) The ability to drain grease out of any traps or low points
formed in the fan or duct near the termination of the
system into a collection container that is noncombustible,
closed, rainproof, structurally sound for the service to
which it is applied and that will not sustain combustion
(5) A grease collection device that is applied to exhaust systems
that does not inhibit the performance of any fan
(6) Listed grease collection systems that meet the requirements
of 7.8.2.1(4) and 7.8.2.1(5)
(7) A listed grease duct complying with Section 4.4 or ductwork
complying with Section 4.5
(8) A hinged upblast fan supplied with flexible weatherproof
electrical cable and service hold-open retainer to permit
inspection and cleaning that is listed for commercial
cooking equipment with the following conditions:
(a) Where the fan attaches to the ductwork, the ductwork
shall be a minimum of 0.46 m (18 in.) away from any
roof surface, as shown in Figure 7.8.2.1.
(b) The fan shall discharge a minimum of 1.02 m (40 in.)
away from any roof surface, as shown in Figure 7.8.2.1.
(9) Other approved fan, provided it meets both of the following:
(a) The fan meets the requirements of 7.8.2.1(3) and
8.1.3.
(b) Its discharge or its extended duct discharge meets the
requirements of 7.8.2.1(2). (See 8.1.3.)
