Thermo Pride CDX1-100N Installation And Operation Manual page 17

All installations and services must be performed by qualified service personnel.
NOTICE: If exterior sidewall building materials are subject to degradation from flue gases or moisture, a
minimum 12" diameter shield made from stainless steel or high density plastic shall be used for protection.
2. The PVC vent termination elbow must be installed in accord with local codes and these instructions.
The bottom edge of the vent termination elbow must be installed at least 12 in. above the outlet of the
combustion air intake termination elbow and must be installed in the same atmospheric pressure zone
(i.e. on the same wall). It is recommended that the horizontal distance between the inlet and flue
termination be kept to a minimum when possible and not exceed 24 in. apart. The vent and air intake
should utilize the same numbers of elbows and approximately the same length of straight pipe to
reach the outside termination elbows. (See Figures 2 & 3).
3. VENT TERMINAL LOCATION REQUIREMENTS
a. The vent terminal shall be located at least 3 ft. above any forced air inlet located within 10 ft.
b. The terminal shall be at least 1 ft. below, 1 ft. horizontally from or 1 foot above any door, window or
gravity air inlet into any building. The bottom of the vent terminal shall be located at least 18 in. above
grade.
c. The terminal shall not be located over public walkways or over an area where condensate or vapor
could create a nuisance or hazard or could be detrimental to the operation of regulators, relief valves
or other equipment.
d. A minimum horizontal clearance of 4 ft. must be maintained from electric meters, gas meters,
regulators and relief equipment. The vent terminal shall not be installed over these or any other
equipment where condensate or vapor could be detrimental to the operation of this equipment and/or
controls.
e. The unit shall be located so a minimum of 1/4" per foot upward slope can be maintained from the
furnace to the terminal outlet and 1/4" per foot downward slope for the last horizontal run of inlet, to
the outside inlet terminal.
f. The vent discharge must be installed a minimum of 12" above grade, 14" from any obstruction and
three feet from an inside corner of an L-shaped structure.
Figure 3
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