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Vertical vent through the roof (Category I):
It is the sole responsibility of the installer to adhere to all current local codes and/or ANSI Z223.1
latest editions for all venting requirements, and practices. Also adhere to instructions below, and the
instructions of the vent manufacturer. Use vent materials certified for Category I.
All models of this series heater are certified Category I for vertical venting. See FIG. 5.
The vent must extend at least 5 feet [1524 mm] above the flue collar of the highest connected
◼
heater
USA: Horizontal run of single wall vent or vent connector ("H" in FIG 5) must not exceed 75%
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of the vertical height of the vent. If it does, then the vent system must be for Category III.
Inputs up to 170,000 Btuh vertical vent can be 4" diameter Type B-Vent; greater than 170,000
◼
Btuh must use 5" diameter Type B-Vent
A vent connector must be secured to the flue collar using quantity 3 x #8 x 1/2" sheet metal
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screws
A horizontal vent connector shall be installed and supported without any dips or sags and
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shall slope upward toward the vent or chimney at least 1/4 in./ft (20 mm/m).
Use a certified termination cap as supplied by the manufacturer of the vent
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When vent and combustion air are taken through the roof, the exhaust vent should always
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terminate higher than the combustion air intake, to prevent recycling the products of combus-
tion back into the heater
The vent must extend at least 2 feet
◼
[610 mm] above the highest point where
it passes through a roof. The vent must
also extend at least two feet higher than
any portion of a building within a hori-
zontal distance of 10 feet [3 m].
Keep vent connector runs as short as
◼
possible with a minimum number of el-
bows. Refer to the current edition of AN-
SI Z223.1 (NFPA 54) installation codes
for maximum length of horizontal vent
and vent connector.
Total length of the vent connector and
◼
vent pipe cannot exceed the values in
Table 4 above.
A single-wall vent connector shall not be
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insulated.
For single−wall vent clearance to com-
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bustibles is 6" [152mm] except where a
listed clearance thimble is used.
Clearance to combustible material
for Type B-Vent or factory-built
vent per the vent manufacturer's
instructions.
FIGURE 7: VERTICAL VENT
15
HE+ Series Modulating Supplemental Manual
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