12
VENTING
PLEASE NOTE: If your specific venting configuration falls in a box in the venting charts (on pages 10 &
11) that is above the dotted line ( ), you must use one of the approved direct vent venting systems
that utilizes a stainless steel inner liner. This requirement is part of the ANSI standards and is based on test-
ing conducted to determine where the exhaust gas temperature drops to the point where condensation might
occur in the vent pipe. The standards require the use of corrosion resistant liner materials if that specific
total vent length is exceeded.
REAR VENTING DIRECTLY THROUGH THE WALL TO A STANDARD HORIZONTAL
VENT TERMINATION
The Gabo Gas Stove can be vented in rear exit with up to 18” of horizontal pipe (and no vertical pipe) util-
izing a standard horizontal vent termination. However, in order for the stove to operate properly, the gas
input rate to the stove must be reduced by down-sizing the main fuel orifice that came installed in the
stove. The replacement orifices for this purpose are shipped with the stove or are available from your
RAIS dealer. The Gabo is shipped from the factory set up to burn natural gas. If you are burning natural
gas, replace the standard orifice with the #39 orifice following the instructions on page 23. If you will be
burning propane, install the #53 orifice when the fuel conversion is done. Refer to pages 23 & 24.
For either fuel, the inlet air restrictor and exhaust outlet baffle should be set at their full open positions to
minimize flow resistance. This corresponds to a setting of
1
for the air inlet setting and
A
for the exhaust
baffle setting. Please note: It is highly recommended that a 14” snorkel vent termination be used for this
type of installation. Including a 14” snorkel can reduce the variability in performance that can occur due
to the low draft associated with this type of installation.
Also note: If a 36” snorkel vent termination is used, the gas input rate to the stove does not have to be re-
duced. To determine the appropriate air inlet restrictor and exhaust baffle settings if using a 36” snorkel,
refer to the venting chart settings on pages 10 & 11 for your fuel type and use 3’ for the vertical rise. Use
the horizontal run that corresponds most closely to your installation. For up to 12” of horizontal run, use
the 1’ box. For 12” to 18” of horizontal run, use the 2’ box. Some fine-tuning from these settings may be
desirable. Please refer to page 20 for additional information.
