Vent Termination Location Requirements - Viessmann Vitodens 100-W WB1A-24 Installation Instructions Manual

Direct Venting (Two-pipe System)
General Installation Info
Vent termination location requirements (for installations 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
building (dryer vents, non-sealed
combustion furnace and hot water
heater vents are considered to be
mechanical air inlets).
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.
*1
Including heat recovery units.
42
(continued)
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:
H 1 ft./0.3 m for inputs up to and
*1
to any including 100 000 Btu/h/30 kW
(applicable only to boiler models
WB2-24C/24).
H 3 ft./0.9 m for input exceeding
100 000 Btu/h/30 kW (applicable to
boiler models WB2-32 and up).
8. ....underneath a veranda, porch or
deck, unless
H the veranda, porch, or deck is fully
open on a minimum of two sides
beneath the floor, and
H 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.
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, 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.