Built in 1971 and a Cessna company hack at this time. Current in (much warmer) Puerto Rico in 2021. It was very rare to see visiting GA aircraft of this class parked outdoors at this time of year without an engine insulation blanket, owing to the arctic conditions making re-starting next to impossible after cool-down. In this case, prior to start-up a 400K BTU heater called a Herman-Nelson would have been fired up and flexible ducts stuffed inside the engine compartment and interior. This would very quickly warm things up enough to get going. An expensive service, so most people stayed home.