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5' MIN
2' MIN
10' OR LESS
2' MIN
VENT CAP
VENT PIPE
DRAFT HOOD
HEATER
For protection against rain or blockage by snow, the
vent pipe must terminate with a vent cap which complies
with the local codes or, in the absence of such codes,
to the latest edition of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54.
The discharge opening must be a minimum of two feet
vertically from the roof surface and at least two feet
higher than any part of the building within ten feet. Vent
stack shall be at least five feet in vertical height above
the drafthood outlet. The vent cap location shall have a
minimum clearance of 4 feet horizontally from, and in no
case above or below, unless a 4-foot horizontal dis-
tance is maintained, from electric meters, gas meters
regulators and relief equipment.
The weight of the vent stack or chimney must not rest
on boiler drafthood. Support must be provided in compli-
ance with applicable codes. The heater top and draft
hood must be readily removable for maintenance and
inspection. Vent pipe should be adequately supported to
maintain proper clearances from combustible construc-
tion.
Type "B" double wall or equivalent vent pipe is recom-
mended. However single wall metal vent pipe may be
used as specified in the latest edition of the National
Fuel Gas Code ANSI Z223.1/NFPA 54.
Fig. #8119
At the time of removal of an existing heater, the
following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances remaining
connected to the common venting system are not in
operation.
VENTING CONNECTIONS
DRAFTHOOD (INDOOR) MODELS 962-1826
Locate and assemble as shown below. Secure with
screws supplied in envelope in carton.
Models 2100-4001 have built-in drafthoods that must be
properly vented to the outside.
VENT PIPING
WARNING:
Indoor heater requires a drafthood that must be
connected to a vent pipe and properly vented to the
outside. Failure to follow this procedure can cause fire
or fatal carbon monoxide poisoning.
Vent piping the same size or larger than the draft hood
outlet is recommended, however, when the total vent
height is at least ten (10) feet (drafthood relief opening to
vent terminal), the vent pipe size may be reduced as
specified in Chapter 10 of the National Fuel Gas Code,
ANSI Z 223.1/NFPA 54 - latest edition. Avoid long
horizontal runs of vent pipe and too many elbows. If
installation requires horizontal or non-vertical runs, the
vent pipe must have a minimum of 1/4 inch per foot rise
and should be supported at not more than five foot
intervals. Plumbers' tape, criss-crossed, will serve to
space both horizontal and vertical piping. Gas vents
supported only by the flashing and extending above the
roof more than five feet should be securely guyed or
braced to withstand snow and wind loads. We recom-
mend use of insulated vent pipe spacer through the roofs
and walls.
5
Fig # 8165