User Guide
GETTING 
STARTED
Transitions
•  
•  
Turning Vanes
Sheetmetal
Offsets
If the duct connection to the furnace in a side 
TURNING
VANES
M5651
M948C
LESS
THAN
7 in.
(178 mm)
OFFSET
AT LEAST
7 in.
(178 mm)
1
1 REQUIRED TURNING VANES HELP DISTRIBUTE AIRFLOW EVENLY.
20 DEGREE EXPANSION PER SIDE PER 
FITTING (4 IN. PER RUNNING FOOT 
[100 MM PER 300 LINEAR MM]) 
RETURN AIR 
DUCT 
TRANSITION FITTING 
ELECTRONIC AIR CLEANER CABINET
M947B 
DUCT SIZE CHANGED GRADUALLY TO PREVENT TURBULENCE. 
Honeywell Media Air Cleaner 68-0239EF—12 3










