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W415-3006 / A / 05.27.21
EN
28
gas installation
CYLINDER SIZE
OPENING A
AREA
OPENING B
AREA
20 lb (9.1kg)
20in
2
(130cm
2
) 10in
2
(65cm
2
)
30 lb (13.6kg)
30in
2
(195cm
2
) 15in
2
(100cm
2
)
5” (127mm)
MAXIMUM
1” (25.4mm)
MAXIMUM
OPENING
A
OPENING
B
2” (51mm)
MINIMUM
PARTITION TO ISOLATE
CYLINDER FROM APPLI-
ANCE
34” (864mm)
RECOMMENDED
5” (127mm)
MAXIMUM
NON LOCKING DOOR
Propane Enclosure
7.4 enclosures for propane gas supply systems
If you build an enclosure for a propane gas cylinder, follow these recommended specifications. You must also follow
local codes.
• An enclosure for a propane gas cylinder shall be ventilated by openings at both the upper and lower levels of
the enclosure.
This shall be accomplished by one of the following:
• One side of the enclosure shall be completely open; or
• For an enclosure having four sides, a top and a bottom:
a) At least two ventilation openings shall be provided in the sidewalls of the enclosure, located within 5” (127mm) of
the top of the enclosure, equally sized, spaced at a minimum of 90° (1.57 rad), and unobstructed. The opening(s)
shall have a total free area of not less than 1in² per lb (14.2cm²/kg) of stored fuel capacity.
b) Ventilation opening(s) shall be provided at floor level of the enclosure and shall have a total free area of not less
than 1/2in² per lb (7.1cm²/kg) of stored fuel capacity. If ventilation openings at floor level are in a side wall, there shall
be at least two openings. The bottom of the openings shall be 1” (25.4mm) or less from the floor level and the upper
edge no more than 5” (127mm) above the floor level. The openings shall be equally sized, spaced at a minimum of
90° (1.57 rad), and unobstructed.
c) Every opening shall have minimum dimensions so as to permit the entrance of a 1/8” (3.2mm) diameter rod.
Ventilation openings in sidewalls shall not communicate directly with other enclosures of the appliance. Cylinder
valves shall be readily accessible for hand operation. A door on the enclosure to gain access to the cylinder valve
is acceptable, provided it is non-locking and can be opened without the use of tools. Designs using a cover to gain
access to the cylinder and cylinder valve shall be provided with handles or equivalent at a minimum of 180° apart
to facilitate lifting of the cover. There shall be a minimum clearance of 2” (50.8mm) between the lower surface of the
floor of the propane gas cylinder enclosure and the ground. The design of the enclosure shall be such that (1) the
propane gas supply cylinder(s) can be connected, disconnected and the connections inspected and tested outside
the cyclinder enclosure; and (2) those connections which could be disturbed when installing the cylinder(s) in the
enclosure can be leak tested inside the enclosure. The enclosure for the propane gas cylinder shall isolate the cylinder
from the burner compartment to provide:
i) Shielding from radiation;
ii) A flame barrier; and
iii) Protection from foreign material.
Be certain to mount or set the propane gas cylinder on a flat surface and restrain it using a cylinder re-
taining bracket to prevent it from tipping.
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