Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 264

SECTION 7 CESSNA
AIRPLANE AND SYSTEMS DESCRIPTION MODEL 172S NAV III
B3119
EXHAUST
MUFFLER
SHROUD
CABIN AIR
CONTROL
CABIN HEAT
CONTROL
DEFROSTER
OUTLETS (
FORWARD
CABIN
LOWER
VENTILATIN
AIR OUTLET
RAMAl
o
REAR CABIN
VENTILATING
AI R OUTLETS (2)
Figure 7-8. Cabin Heating, Ventilating and Defrosting System
7-58 U.S.
172SPHAUS-OO