9
Vent Clearances When Heater is In-
stalled Indoors
• 1.2m (4') below, 1.2m (4') horizontally from,
or 0.3m (1') above any door, operable win-
dow, or gravity air inlet into any building.
0.9m (3') above any forced air inlet within
3m (10').
Maintain the following clearances to any
opening in any building:
Illustration
(Noritz vent cap)
• 0.3m (1') below, 0.3m (1') horizontally from,
or 0.3m (1') above any door, operable
window, or gravity air inlet into any building.
0.9m (3') above any forced air inlet within
3m (10').
Vent Clearances When Heater is Installed
Outdoors With a Vent Cap
* All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code,
ANSI Z223.1 and in Canada, in accordance with NSCNGPIC.
* For Installations in Canada, clearances are as follows: To windows, doors, & gravity air inlets: 900mm (36").
To forced air inlets: 1.8m (6'). These clearance requirements hold true for all of the above situations: Indoor,
Outdoor w/vent cap.
0.9m (3')
0.3m (1')
1.2m (4')
1.2m (4')
Clearance Requirements from Vent Terminations to Building Openings
0.3m (1')
0.3m (1')
0.9m (3')
0.3m (1')
