Installation and Operation
26D4720
6
MCUF Series Vent-Free Firebox
E
D
F
G
556M”
3256”
256O”
6”
A
B
256O”
2656M"
96M”
856M”
376”
C
264720
MCUF dims
Min. Rough
Opening 
Depth
Min. Rough
Opening
Height
H - Min. Rough Opening Width
K
J
J
L
376M”
I
    
  A  41Z\v"  47"
  B  36"  42"
  C  18Z\v"  18Z\v"
  D  32"  38"
  E  20C\v"  20C\v"
  F  27Z\v"  33Z\v"
  G  33M\,"  39M\,"
  H  41Z\v"  47Z\v"
  I  17C\v"  17C\v"
  J  48C\v"  53"
  K  68M\,"  74M\,"
  L  34Z\x"  37Z\x" 
Figure 1 - 
Firebox and Framing Dimensions
A
B
C
D
E
FP2686
hearth dims
      
  A  26Z\v"  25C\v"  32Z\v"  31C\v"
  B  15"  14C\v"  15"  14C\v"
  C  32B\,"  31Z\,"  38B\,"  38Z\,"
  D  25"  25"  25"  25"
  E  20Z\x"  20Z\x"  20Z\x"  20Z\x" 
Figure 2 - 
Minimum Hearth Dimensions










