HTP EL-399NVWH - Manual (Page 35)

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LP- 346 REV. 3.20.14
I. VERTICAL VENTING
Figure 15 – Vertical Venting - LP-293-F
NOTE: Vent piping should be 12” over anticipated maximum snow level.
NOTE: Drawing is meant to demonstrate system venting ONLY.
All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼” per foot back to the heater to allow
drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot of the heater and the
balance at 4 foot intervals on the vent pipe. Heater venting must be readily accessible for visual inspection for the first three feet from
the heater.