Venting
A. Clearance above grade, veranda, porch, deck, or balcony 12in [30cm] min.
[1,2]
B. Clearance to window or door that may be opened. 12in [30cm] min. for appliances 100,000BTUh [30kW] and lower, in
Canada. 9in
[2]
[23cm] for appliances 50,000 BTUh and lower, in USA.
C. Clearance to permanently closed window min. 12in [30cm] recommended to prevent condensation on window, in Canada.
9in
[2]
[23cm] for appliances 50,000 BTUh and lower, in USA.
D. Vertical clearance to ventilated soffit located above the termination within a horizontal distance of 2ft [60cm] from the
center line of the termination. (18in [46cm] MQZDV3927 / 24”[61cm] MQZDV4634) min.
[4]
E. Clearance to unventilated soffit 12in [30cm] min.
F. Clearance under veranda, porch, deck or balcony 12in [30cm] min.
[3]
(US
[4]
)
G. Clearance from a perpendicular inside wall or outer corner to the edge of the vent terminal plate is 3in [7.6cm] min.
H. Clearance to each side of center line extended above meter/regulator assembly 3ft [91cm] within a height 15ft [4.5m]
above the meter/regulator assembly.
I.
Clearance to service regulator vent outlet 3ft [91cm] min.
[1]
(US
[4]
)
J.
Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance: In Canada, 6in
[15cm] for appliances
≤
10,000 BTUh [3kW], 12in
[1]
[30cm] minimum for appliances >10,000 BTUh [3kW] and
≤
100,000
BTUh [30kW], 36in [91cm] for appliances >100,000 BTUh [30kW]. In the USA, 6in
[2]
[15cm] for appliances
≤
10,000 BTUh
[3kW], 9in [23cm] for appliances >10,000 BTUh [3kW] and
≤
50,000 BTUh [15kW], 12in [30cm] for appliances >50,000
BTUh [15kW].
K. Clearance to a mechanical air supply inlet 6ft [1.8m] min.
[1]
in Canada. In USA, 3ft [91cm] above if within 10ft
[2]
[3m]
horizontally.
L. Clearance above paved sidewalk or a paved driveway located on public property 7ft [2.1m] min.
[5]
M. Clearance above highest point of exit on roof 18in [45cm].
N. Clearance to perpendicular wall 24in [60cm].
(Recommended to prevent re-circulation of exhaust products. For additional requirements check local codes.)
1
In accordance with the current CSA B149.1, Natural Gas and Propane Code.
2
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.
3
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
4
Clearance in accordance with local installation codes and the requirements of the gas supplier.
5
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
NOTES:
1)
Clearances are to the edge of terminal plate. Add 6-3/4” for
MQZDV3927 / 8-1/8” MQZDV4634 to clearances to arrive at
centerline.
2)
Local codes or regulations may require different clearances.
44
Summary of Contents for Cove MQZDV3927
Page 37: ...37 ...
