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VENTING REQUIREMENTS — WITH GAS TANK HEAT
Hobart model AM15, AM15F or AM15T dishwashers equipped for gas tank heat are not provided with
a flue collar and are not intended to have the flue directly connected to a ventilation system. However,
the products of combustion must be vented to the outside air. The most common method of venting
is a vent hood over the entire dishwasher (Fig. 12). Refer to Rate of Exhaust Flow Calculations on the
next page for calculations of the proper vent rate for your hood. Another method is a small vent hood
(Fig. 13) positioned about five inches above the flue exit at the rear of the dishwasher and connected
to existing ductwork. In either case, an electrical interlock must be installed to allow the flow of gas
to the dishwasher burner ONLY when the exhaust system is energized. For additional information,
refer to the National Fuel Gas Code, ANSI Z223.1, NFPA 54.
• IMPORTANT: Make sure the installation meets the local code for your area.
Fig. 12 Fig. 13
3
1
/2"
6"
➤
➤
➤
➤
➤
➤
4"
➤
3" x 3" DUCT INTO
CURRENT SYSTEM
➤
5" GAP
MINIMUM
➤
➤
MINI VENT HOOD
DISHWASHER FLUE EXIT
➤
➤
➤
6"
MINIMUM
OVERHANG
ON ALL SIDES
➤
➤
1' TO 4'
CLEARANCE
➤
➤
18" OVERHANG
RECOMMENDED
OVER LOADING OR
UNLOADING DOORS