Beechcraft C23 SUNDOWNER 180 Pilot Operating Handbook page 165

BEECHCRAFT Sundowner
180
Section VII
C23 (M-1285 and After)
Systems Description
HFATER AIR
HEATER
MUFFLER
FRESH
AIR
MIXER
FRESH
AIR INLET
EXHAUST
BOX
DEFROST AIR .
AIR
FIRE WALL
FRESH AIR INLET
C
CLKE
S (2)
COCLKETIT ATER
CABIN HEATER
OUTLETS (3)
FRESH
AIR
OUTLETS
AFT CABIN
-
BULKHEAD
FIXED EXHAUST
OPTIONAL
VENTILATION' FAN
FRESH
AIR
INTAKE
(DORSAL FIN)
M-1875,
M-1880
AND AFTER
ENVIRONMENTAL
SCHEMATIC
February
1979
7-29