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2. For horizontal venting, the vent lengths may be as
follows:
Minimum Equivalent Length = 3 feet (0.9144 m) of Pipe
Maximum Equivalent Length = 25 feet (7.62 m) of Pipe
NOTE: To minimize problems associated with
condensation in long runs, vent pipe can be
insulated.
3. The horizontal venting system approved with this heater
is the Horizontal Stainless Steel Vent Kit mentioned on
page 3 .
4. Limit the quantity of 90° elbows to two. When vent
pipe is in a horizontal run, it must be pitched upward
¼" per foot (0.635 cm per 0.3m) towards the vent
terminal. The heater must be installed level.
5. The horizontal venting system shall not terminate:
a) Less than 4 feet (1.2m) below, 4 feet (1.2m)
horizontally from, or 1 foot (30cm) above any
door, window or gravity air inlet into any building.
The bottom of the vent terminal shall be located
at least 7 feet (2.1m) above grade or above snow
accumulation levels as determined by local codes.
b) Less than 1 foot (0.3m) from a combustion air inlet.
c) Less than 3 feet (0.9m) from any other building
opening or any gas service regulator.
d) Directly over areas where condensate or vapor could
create a nuisance or hazard or be harmful to the
operation of gas utility meters, regulators, relief
valves, or other equipment. Building materials should
be protected from flue gases and condensate.
6. In regions of the country where prevailing winds are
consistently higher than 40 mph (64.4 kmh), it may be
necessary to terminate the vent system above the roof
level.
Vent Cap
24"
(0.61 m)
CAT III
Vent Pipe
Wall Thimble
Wall
Gas-Fired Low-Intensity Infrared Heater
Venting/Ducting
For Commercial and Industrial Installations Only
General Requirements
Use aluminum or teflon tape suitable for 550°F (3M
Company tapes #433 or #363) or RTV silicone sealant.
Heater must be vented in accordance with specification
ANSI Z223.1 - latest revision. Partial information relating
to this specification is provided in this section with regard
to size and configurations for venting arrangements. For
complete information consult ANSI Z223.1 - latest revision
and applicable local codes. Use the following guidelines to
help insure an adequate, safe venting arrangement.
a) Be sure that method selected for venting heater
complied with all codes are required for each particular
location.
b) Exhaust end of heater will accept a four (4") inch
[10.16 cm] flue pipe using the flue pipe adapter.
c) Heater may be vented to the outdoors either vertically
or horizontally, provided that it follow category
guidelines.
d) If the heater is to be vented horizontally:
1. Vent must exit buidling not less than seven (7') [2.13
m] feet above grade when located adjacent to public
walkways.
2. Vent must terminate at least one (1') foot [0.3m]
above any forced air inlet located within ten feet
(10') [3 m].
3. Vent must terminate at least four (4') feet [1.22 m]
below, four (4') feet [1.22 m] horizontally from, or
one (1') foot [0.3m] above any door, window, or
gravity inlet into any building.
4. Vent terminal shall be located at least twelve (12")
inches [0.3m] from any opening through which vent
gases could enter the building.
e) Vent terminal opening must be beyond any
combustible overhang.
f) If condensation in the flue is a problem, the flue length
should be shortened or insulated.
g) For vent specifications all of the following conditions
must be met:
The maximum equivalent length of vent pipe should
be carefully observed. A safety switch in the heater is
designed to shut the heater off before excessive flue
restriction causes bad combustion.
Minimum Equivalent Length = 3 feet (0.9144 m) of Pipe
Maximum Equivalent Length = 25 feet (7.62 m) of Pipe
Limit the quantity of 90° elbows to two. When vent
pipe is in a horizontal run, it must rise not less than ¼
inch per foot from the start of the vent system towards
the vent terminal.
13
Operating Instructions and Owner's Manual
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