Constructing The Appliance Chase; Clearances - Heat & Glo XLR-N-AU Owner's Manual

B. Constructing the Appliance Chase
A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should enclosed inside the chase.
NOTICE: Treatment of ceiling firestops and wall shield
firestops and construction of the chase may vary with the
type of building. These instructions are not substitutes
for the requirements of local building codes. Therefore,
you MUST check local building codes to determine the
requirements to these steps.
Chases should be constructed in the manner of all out-
side walls of the home to prevent cold air drafting prob-
lems. The chase should not break the outside building
envelope in any manner.
NOTE: Frame opening height is greater than plaster opening height.
B
D
A
Rough
Opening
(Vent Pipe)
Inches 8-3/4
Millimeters 220
Figure 5.2. Clearances to Combustibles
20
A
C
MINIMUM FRAMING DIMENSIONS*
B C D
Rough Rough Rough
Opening Opening Opening
(Height) (Depth) (Width)
42 18 50
1070 460 1270
Heat & Glo • XLR-N-AU, XLR-PB-AU • 2198-906 Rev. M • 5/12
C. Clearances
NOTICE: Install appliance on hard metal or wood surfaces
extending full width and depth. DO NOT install directly
on carpeting, vinyl, tile or any combustible material other
than wood.
WARNING! Risk of Fire! Maintain specified air space
clearances to appliance and vent pipe:
• Insulation and other materials must be secured to prevent
accidental contact.
• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with fireplace or chimney.
• Failure to maintain airspace may cause overheating and
a fire.
Note: Figure 5.2 shows the fireplace installed on the
floor. However, this fireplace can be elevated off the floor
provided that the fireplace is properly supported by framing
materials and the ceiling clearances are maintained.
F
J
E F
Clearance Combustible Combustible
to Ceiling Floor Flooring
31 0
790 0
MEASURE FROM TOP
OF FIREPLACE OPENING
G
I
G H I
Behind Sides of
Appliance Appliance
0 1 1
0 30 30
E
H
J
Front of
Appliance
36
910