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2
INSTALLATION
2.8
Flue Venting
The following guidelines must be observed to ensure
proper system performance and safety:
* Check all applicable codes prior to installing flue
stacks. Local codes may vary.
* The heater is designed to operate with a 3-in./7.6cm
diameter 26 ga. minimum exhaust stack.
* Single-wall galvanized flue pipe or Dura/Connect
single wall, flexible connectors must be used. The
portion of the flue pipe which goes through
combustible material in the building wall or roof
must pass through a type "B" vent to maintain
clearance (see figure 2.8.1 through 2.8.2).
* Maximum vent length for all models is 20 ft./6.1m
including two 90 degree elbows.
* The bottom of the vent terminal shall be
located at least 7 ft./2.13m above grade.
* Uninsulated single-wall metal pipe shall not be
used in cold climates for venting gas utilization
equipment.
* The vent terminal of a horizontal venting system
must be installed to prevent blockage by snow and
protect building materials from degradation by
flue gases.
* Vertical venting should be a minimum of 24 inches
/61cm above the roof in an area that prevents snow
blockage. See Figure 2.8.1
* Horizontal venting must maintain a minimum
distance from the vent termination to the sidewall.
See Figure 2.8.2
* Buildings incorporating vented soffits/overhangs
must ensure that the products-of-combustion do
not enter the attic space.
* A common flue of 4 in./10.2cm diameter must be used
for double-venting of units. One thermostat must
control both units. When common venting is
used, flues should be connected so that the by-
products of one heater cannot flow into the
adjoining flue of the other heater. A dual-exhaust
assembly is available from Brant Radiant Heaters,
Part Number DB-3YA (see Figures 2.8.4and 2.8.5). A
Duravent DB-3VK vent kit must be used for sidewall
venting LD models.
Figure 2.8.1
Figure 2.8.2
16
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