Horizontal Exhaust Vent Termination - FULTON FHE-250 Installation, Operation & Maintenance Manual

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2.13.1

HORIzONTAL ExHAUST VENT TERMINATION

IMPORTANT NOTE: Wherever horizontal runs of exhaust vents are installed, a minimum slope of 1:50 must be
maintained, falling back toward the boiler(s).
Adhere to the following for installation:
1. Where the vent termination is joined to the vent pipe outside the wall. Use the same joining
procedures for vent pipe and fittings. The termination of the vent system must be at least
305 mm above the finished grade, or at least 305 mm above normal snow accumulation
level (for applicable geographical areas). The termination of the vent system should not be
located in traffic areas such as walkways, adjacent buildings, openable windows and building
openings unless the venting system is at least 21.3 m above finished grade. The vent
terminations must be at least 1.22 m horizontally from electric meters, gas meters,
regulators, and relief equipment.
2. When installing inlet and exhaust terminations on the same wall, the exhaust outlet must be
installed 0.914 m minimum above and downwind from air supply inlet to prevent exhaust
recirculation. Under certain wind conditions, some building materials may be affected by flue
products expelled in close proximity to unprotected surfaces. Sealing or shielding of the
exposed surfaces with a corrosion resistant material may be required to prevent staining or
deterioration.
3. The minimum vent height should extend to at least 0.914 m above the roof, or at least
0.609 m above the highest part of any structure within 3.04 m of the vent.
4. If the exhaust vent terminates within 3.04 m horizontally of the air inlet, the exhaust vent
must be at least 1.22 m above the inlet. Dimensions listed above and those illustrated are
minimum, and may or may not be sufficient for conditions at a specific job site.
5. To prevent the possible re-circulation of flue gases,the vent designer must take into
consideration factors such as prevailing winds, eddy zones, building configurations,
etc. Fulton cannot be responsible for the effects such adverse conditions may have on the
operation of the boilers. It is important to locate the exhaust duct in such a way that it does
not become blocked due to snow, ice, and other natural or man-made obstructions.
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FHE-250 MANUAL 09 2014 ISSUE 2