Procom GHBVN50 Manual page 9

HORIZONTAL VENTING−RESIDENTIAL
1. For horizontal residential installations these units are certified as Category I appliances. The vent may be single
wall material minimum 25 gauge galvanized steel or equivalent grade stainless steel or a single section of type
B−1 vent installed according to the sections General Recommendations and Requirements and Horizontal Venting
General and Horizontal Venting − Residential.
2. The vent pipe diameter for horizontal residential installations shall be 4" (102mm) on 45K Btu/hr units and
75K Btu/hr units. A standard vent transition is required at unit in addition to the transition
supplied with the unit.
3. The maximum vent length is 5 feet (2m) plus one 90° elbow.
4. The vent must maintain a 1/4" (6mm) rise per foot (304.8mm) of slope upwards toward the termination
5. Unit models 45 and 75 must terminate with a 12"(305mm) vertical rise at the tee termination. See figure 7.
Fig.6
Fig.7
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