At my home airport, Helsinki-Malmi (minus 20 C yesterday) winter ops would be impossible without preheat. The airport provides electric outlets (230V, 16A) on pylons, adjacent to about 50 of the parking spots on the apron, for a monthly charge. What we use for the Cessnas which are not hangared - space is scarce - is 1200 W Defa car heaters placed inside the air intakes. If itīs really cold, 2 heaters per aircraft. Going on all night and all day. It works, too. Since 1969, in fact
