NANO

HVAC 837 HVAC The refrigerant flow through HVAC system is same as that of A/C system. The only difference is, in HVAC system, there is a heater coil or heater core which functions as a heat transfer unit for providing warm air. Hot engine coolant is circulated through heater coil. A blower is positioned in front of the heater core to blow cold outside air over the core. As this air travels over the heater core, it heats up and becomes the hot air which blows through the vents. For achieving different temperature, hot air fromheater can be blended with cold air from evaporator. HVAC A - Air direction mode selection knob B - Blower speed selection knob C - Temperature control knob D - AC ON / OFF switch E - Air recirculation / Fresh air lever Recirculation mode Fresh Air mode