Part 3 - Appliance location
Closet Installations
For closet installations, it is necessary to provide two ventilation air openings as shown in Figure 3-1 each
providing a minimum area equal to 22 cm
2
per kW (1 in
2
per 1000 Btu/hr), but not less then 645 cm
2
(100 in
2
)
and within 152 mm (6”) of the top and bottom of the closet door. See Table 3-1 for minimum recommended
clearances.
Alcove Installations
Alcove installations have the same minimum clearances as closet installations, except the front must be
completely open to the room at a distance no greater then 457 mm (18”) from the front of the appliance and the
room is at least three (3) times the size of the alcove. Provided these conditions are met, the appliance
requires no extra ventilation air openings to the space. See Table 3-1 for minimum recommended clearances.
Residential Garage Installations
When installed in a residential garage, mount the appliance a minimum of 457 mm (18”) above the floor. Locate or
protect the appliance so it cannot be damaged by a moving vehicle. Check with your local authorities for
Figure 3.1 Closet installation minimum clearances
Top view
30 mm (1.2”) surrounding
clearance for concentric
vent pipe
152 mm (6”) max.
above vent opening
Left and right Side 13 mm (0.5”)
Front 152 mm (6”)
Removable Surface or Closet Door
Top 152 mm (6”)
Ventilation Air Opening
22 cm
2
per kW (1 in
2
per 1000
Btu/hr), min. 645 cm
2
(100 in
2
)
Ventilation Air Openings
are not required if the
appliance area meets
the listed Recommended
Clearances in Table 3-1.
152 mm (6”) max.
below vent opening
Bottom view
30 mm (1.2”) surrounding
clearance for hot water pipes
Closet/alcove installations in Canada require approved concentric systems or
Warning vent and air-inlet pipe, fittings, cements and primers. Failure to comply may result
in damage or serious injury.
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