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Nissens Heat Exchanger, interior heating 70220 Replaces 443 819 031D,443.819.030,443.819.031 B,443.819.031 CHeaters Warm air production and safety by demisting the panes The heater is an integral part of the engine cooling system. However, it contributes significantly to the climate system ensuring the production of warm air. The heater is often located behind the dashboard or in the HVAC module. Hot coolant from the engine block passes through the heater, warming up the intake air blown on its surface by the interior blower. The air gets warmer and can be forwarded into the car cabin. As heater produces warm air during cold days in autumn and winter, it significantly improves safety by shortening the demisting of the vehicle’s panes.Core Dimensions : 272 X 150 X 30 mmDiameter : 18 mmIf you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.