Vent Termination Location Requirements; (For Installations In Canada); Vent Termination Location Requirements (For Installations In The U.s.a.); Common Venting - Viessmann Vitocrossal 300 CU3A Installation Instructions Manual

CU3A Venting Systems Installation
Important Regulatory and Installation Requirements
Vent termination location requirements (for installation in
Canada)
The vent must be installed observing local regulations in
addition to National Codes, CAN/CSA-B149.1 or 2.
A vent must NOT terminate...
1...directly above a paved sidewalk or paved driveway
which is located between two single-family dwellings and
serves both dwellings.
2...less than 7 ft. (2.13 m) above a paved sidewalk or a
paved driveway located on public property.
3...within 6 ft. (1.83) m of a mechanical air supply inlet*
to any building (dryer vents, non-sealed combustion
furnace and hot water heater vents are considered to be
mechanical air inlets).
* 1 Including heat recovery units.
4...above a meter/regulator assembly within 3 ft. (0.9 m)
horizontally of the vertical centerline of the regulator vent
outlet and to a maximum vertical distance of 15 ft. (4.5 m).
5...within 3 ft. (0.9 m) of any gas service regulator vent
outlet.
6...less than 1 ft. (0.3 m) above grade level or anticipated
snow level (consult local building authorities or local
weather office). Locate the vent termination in such a way
that it cannot be blocked by snow.
7...within the following distances of a window or door
which can be opened in any building, any non-mechanical
air supply inlet to any building or the combustion air inlet
of any other appliance:
1 ft. (0.3 m) for inputs up to and including 100 000

Btu/h (30 kW).
3 ft. (0.9 m) for input exceeding 100 000 Btu/h (30 kW).

Vent termination location requirements (for installation in
the U.S.A.)
The vent must be installed observing local regulations in
addition to National Codes, ANSI-Z223.1 or NFPA 54.
A vent must NOT terminate...
1...less than 7 ft. (2.13 m) above a paved sidewalk or a
paved driveway located on public property.
2...above a meter/regulator assembly within 3 ft. (0.9 m)
horizontally of the vertical centerline of the regulator vent
outlet and to a maximum vertical distance of 15 ft. (4.5 m).
within 3 ft. (0.9 m) of any gas service regulator vent outlet.
......
3...at least 3 ft. (0.9 m) above any forced air inlet located
within 10 ft. (3 m).
4...less than 1 ft. (0.3 m) above grade level or anticipated
snow level (consult local building authorities or local
weather office). Locate the vent termination in such a way
that it cannot be blocked by snow.
5...within 1 ft. (0.3 m) of a window or door which can
be opened in any building, any non-mechanical air supply
inlet to any building or the combustion inlet of any other
appliance.
8...underneath a veranda, porch or deck, unless:
the veranda, porch, or deck is fully open on a minimum

of two sides beneath the floor, and
the distance between the top of the vent termination

and the underside of the veranda, porch, or deck is
greater than 1 ft. (0.3 m).
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9...in areas where condensation may cause problems,
such as above planters, patios, or adjacent to windows
where flue gases may cause fogging.
10...within 3 ft. (0.9 m) to the property line (advisable,
not mandatory; please check with local building authorities
and municipal bylaws).
11...at a location where ice formation on the ground can
present a hazard.
12...so that the flue gases are directed toward brickwork,
soffits, siding, or other construction, in such a manner
that may cause damage from heat or condensate from the
flue gases.
13...where discharging hot flue gases may cause property
damage or personal injury.
14...within 3 ft. (0.9 m) from an inside corner of outside
walls.
6...in areas where condensation may cause problems,
such as above planters, patios, or adjacent to windows
where flue gases may cause fogging.
7...within 3 ft. (0.9 m) to the property line (advisable, not
mandatory; please check with local building authorities
and municipal bylaws).
8...at a location where ice formation on the ground can
present a hazard.
9...so that the flue gases are directed toward brickwork,
siding, or other construction, in such a manner that may
cause damage from heat or condensate from the flue
gases.
10...where discharging hot flue gases may cause property
damage or personal injury.
11...within 3 ft. (0.9 m) from an inside corner of outside
walls.
(continued)
Safety
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