CDV Series Direct Vent Gas Fireplace
Termination Clearances
Termination clearances for buildings with combustible and noncombustible exteriors.
Inside CornerOutside CornerRecessed Location
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| B = | C | D |
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| C | ||
| A = |
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| Combustible | ||
A | Combustible |
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| 6"(152mm) |
| E |
6"(152mm) |
| V | Noncombustible |
| V | |
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| Noncombustible | 2"(50mm) |
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V | 2"(50mm) |
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| B |
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Balcony - |
| Balcony - |
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with no side wall |
| with perpendicular side wall |
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G | H | |
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V | V | |
G = | Combustible & | |
Noncombustible | ||
Combustible & | ||
Noncombustible | H = 24"(610mm) | |
12"(305mm) | J = 20"(508mm) | |
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J
C = Maximum depth of 48" (1219mm) for recessed location.
D = Minimum width for back wall of a recessed location. Combustible 38"(965mm) Noncombustible 24"(610mm)
E = Clearance from corner in recessed location. Combustible 6"(152mm) Noncombustible 2"(50mm)
Fig. 8 Termination clearances.
General Information Assembling Vent Pipes
Canadian Installations:
Venting system must be installed in accordance with the current
USA Installations:
The venting system must conform with local codes and/ or the current National Fuel Gas code ANSI Z223.1/ NFPA 54.
Only venting components manufactured by CFM Corpo- ration can be used in Direct Vent systems.
Flex Vent Pipes
Before joining the flex vent pipe to the unit, apply a bead of high temperature sealant* (provided) to the 4” pipe exiting the fireplace. Secure flex vent pipe in place with a hose clamp (provided).
*Be sure the flex pipe overlaps at least 1” (25 mm) onto the collars of the fireplace and termination. If the ter- mination has an internal bead, be sure to overlap and secure 1” (25 mm) past the bead.
*Be sure the vent is actually crushed before proceed- ing. Apply a tug to be sure the vent will not slip off the collars.
Repeat process with 7” flex vent pipe. The same proce- dure must be performed on the vent side.
Hose Clamp 
Apply High Tempera- ture Sealant
FP1471a
Fig. 9 Apply high temperature sealant to 4” and 7” pipes.
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