Mpb40 and mpb45 log placement – Lennox International Inc. MERIT PLUS MPB3530CNM-B User Manual
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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
B-VENT GAS FIREPLACES (MPB33/35/40/45) • INSTALLATION INSTRUCTIONS
Figure 28: Log Set 24M25 Placement
MPB40 AND MPB45 LOG PLACEMENT
Catalog Number for the entire log set: 24M25
1
 Log 
 Number Description (Stamped #)
1
Log, Center (39-8)
2
Log, Rear (138)
3
Log, Right (39-10)
4
Log, Left (39-9)
5
Log, Top/Left (39-11)
6
Log, Top/Right (39-11)
Position the individual logs as shown below. Logs should be placed 
in the order shown. Position the center log on the burner fi rst, then 
place the glowing embers as shown in Figure 52. Place the rear 
log, both the right and left, and then the smaller left and right top 
logs. All logs that have notches to fi t over the grate tines should 
be positioned with these notches directly against the grate. All top 
logs that rest on lower logs, do so over fl attened mounting faces 
in the bottom logs.
Proper log and twig placement is critical to encourage outstanding 
fl ame appearance and prevent sooting.
2
3
4
5
6
1
2
3
4
6
5
