Page 4
This appliance must only be used in an above ground, open air situation with natural
ventilation, without stagnant areas, where gas leakage and products of combustion are
rapidly dispersed by wind and natural convection. Any enclosure in which the appliance is
used must comply with one of the following:
(1) Any enclosure with walls on all sides, but at
least one permanent opening at ground
level, and no overhead cover. See Figure 1.
(2) Within a partial enclosure that includes an
overhead cover and no more than two walls.
See Figure 2 and Figure 3.
(3) Within a partial enclosure that includes an
overhead cover and more than two walls (see
Figure 4 and Figure 5), the following shall apply:
(i) At least 25% of the total wall area is
completely open; and
(ii) At least 30% of the remaining wall
area is open and unrestricted.
(iii) In the case of balconies, at least 20%
of the total of the side, back and front
wall areas shall be and remain open
and unrestricted.
FIGURE F1—OUTDOOR AREA–EXAMPLE 1
FIGURE F2—OUTDOOR AREA–EXAMPLE 2
FIGURE F3—OUTDOOR AREA–EXAMPLE 3
Both ends open
FIGURE F4—OUTDOOR AREA–EXAMPLE 4
Open side at
least 25% of
30 percent or more in
total of the remaining
wall area is open and
unrestricted
FIGURE F5—OUTDOOR AREA–EXAMPLE 5
Open side at
least 25% of
30 percent or more in total
of the remaining wall area
is open and unrestricted
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