9
AVFLST Vent Free Fireplace
Monessen • AVFLST42 Installation Instructions • 4118-900 Rev. B • 05/2020
PRE-INSTALLATION INFORMATION
FP3029
c. Caulking or sealants are applied to areas such as joints
around window and door frames, between sole plates
and floors, between wall-ceiling joints, between wall
panels, at penetrations for plumbing, electrical and gas
lines and other openings.
The following formula can be used to determine the maxi-
mum heater rating per the definition of unconfined space:
BTU/Hr = (L
1
+ L
2
) Ft x (W) Ft x (H) Ft
50
Consider two connecting rooms with an open area
between, with the following dimensions:
L
1
= 15
1
/
2
Ft., L
2
= 12 Ft., W = 12 Ft., H = 8 Ft.
BTU/Hr = (15
1
/
2
+ 12) x (12) x (8)
50
If there were a door between the two rooms the calculation
would be based only on the room with the heater.
BTU/Hr = (15
1
/
2
) x (12) x (8)
50
FIREPLACE LOCATION
This unvented fireplace requires no outside venting and
burns cleanly and efficiency. As a zero-clearance unvented
fireplace, it can be installed recessed into any wall that is
accessible to a gas line, except in a bedroom or bathroom.
Carefully select the best location for installation of your
unvented fireplace. The following factors should be taken
into consideration.
•
Clearance to side wall, ceiling, woodwork and window
or other combustibles. Refer to
Clearance and Height
Requirements
section on
Page 10
. Minimum clear-
ances to combustibles
must be maintained.
•
Location must not be affected by drafts caused by
kitchen exhaust fans, ceiling fans, return air registers
for forced air furnaces / air conditioners, windows or
doors.
•
Installation must provide adequate ventilation and
combustion air.
•
DO NOT INSTALL THIS MODEL IN A BEDROOM
OR BATHROOM.
•
Location should be out of high traffic areas and
away from furniture and draperies due to heat from
firebox.
•
Never obstruct the front opening of the unvented fire-
place or restrict the flow of combustion and ventilation
air.
•
Minimize modifications to existing construction. Refer
to
Figure 5
below for location suggestions.
•
Do not install in the vicinity where gasoline or other
flammable liquids may be stored. The unvented fire-
box must be kept clear and free from the combustible
materials.
WARNING!
If the area in which the heater may be operated
does not meet the required volume for indoor
combustion air, combustion and ventilation
air shall be provided by one of the methods
described in the
National Fuel Gas Code, ANSI
Z223.1/NFPA 54
, the
International Fuel Gas
Code
or applicable local codes.
W
H
Counter
Fireplace
Figure 4.
Fireplace locations
Indoor application
Exterior wall application
with AVFLSTSSODK installed
Figure 5.
Possible Fireplace Locations
