Installation and Operation
7
26D4720
MCUF Series Vent-Free Firebox
Carefully  select  the  best  location  for  installation  of  your 
vent-free  rebox.  The  following  factors  should  be  taken 
into consideration:
•  Clearance to side wall, ceiling, woodwork and windows. 
Refer to “Clearances/Height Requirements on Page 8. 
Minimum clearances to combustibles 
•  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 com-
bustion air.
•  Location should be out of high trafc or windy or drafty 
areas.
•  
•  Never obstruct the front opening of the vent-free rebox 
or restrict the ow of combustion and ventilation air.
•  Minimize modications to existing construction. Refer 
to Figure 3 below for location suggestions.
•  Do  not  install  in  the  vicinity  where  gasoline  or  other 
ammable liquids may be stored. The vent-free rebox 
must  be  kept  clear  and  free  from  these  combustible 
materials. 
FP2440
fireplace locations
Figure 3 - 
Possible Firebox Locations
Ensure  that  minimum  clearances  shown  in  Figures  4 
through 7  are  maintained. Left  and right  clearances are 
determined when facing the front of the rebox. 
Follow these instructions carefully to ensure  safe  instal-
lation. Failure to follow these requirements may create a 
re hazard.
1. The clearance from the inside 
of the appliance to any combustible wall should not be 
less than 6". Figure 4
2. The ceiling must be at least 42” 
from the top of the rebox opening. Figure 4
3.      The appliance  may  be placed 
against a combustible back wall. 
6"
Minimum
42"
Minimum
6"
Minimum
FP2687
minimum clearances
FP2687
Figure 4 - 
Clearance and Height Requirements
 This inner chamber rebox oor must 
be installed at least 6" above any combustible ooring 
material,  such  as  carpeting  or  asphalt  tile,  which  is 
closer than 14" to the base of the rebox. Figure 5 
    Or
    The inner chamber rebox oor may be installed nearer 
to the oor if a minimum of 14" of noncombustible mate-
rial such as slate or marble is installed between the base 
of the rebox and the combustible ooring. Figure 6










