Thermo Pride Gas/Propane Furnace Premiere Series 2-Stage CHX3 - Manual (Page 22)

All installations and services must be performed by qualified service personnel.
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Install these optional kits according to the instructions provided with each kit. The location and
clearance requirements are identical to those of the standard vent terminations described in this
manual.
Figure 6: Optional Direct Vent Kits for the CHX3 / CDX3 Model Series of Furnaces
G. Connecting The Furnace To Roof Exhaust / Intake Terminations
If it is not desirable, or feasible, to vent the furnace through a sidewall, it may be vertically vented
through the roof. Installation shall conform to the following guidelines, which are illustrated in
Figure 6A, below.
1. The outlet of the exhaust vent and the inlet of the combustion air intake, i.e. the terminations,
shall be a minimum of 12-inches above highest anticipated snow level.
2. The exhaust vent outlet must be installed a minimum of 12-inches above the air intake inlet.
3. Where exposed to prevailing winds, the combustion air intake shall be installed upwind of the
vent outlet.
4. The exhaust vent and combustion air intake can be a minimum of 3-inches and a maximum
of 24 inches apart.
NOTICE: When the vent termination is installed correctly, a draft should NOT be present in
the system during the furnace off-cycle.
Figure 6A: Typical Rooftop Vent and Air Intake Termination Construction Details
370191
SIDE WALL VENT KIT
VERTICAL
HORIZONTAL
AOPS7488 / AOPS7489
CONENTRIC VENT KIT