Diesel Portable Heater Output Through A Window?

[Silverghost500]

I'm considering getting a portable diesel heater to keep outside the van during cold weather camping offgrid. I don't want to get one of the smaller heaters and permanently install it and the fuel tank inside the van.

Is anyone using this configuration, and if so are you routing the heater output through either the driver or passenger side window? There would have to be some way to insult the output hose from the glass to prevent the glass from cracking due to temperature differences. If someone has pics of this setup I'd like to see some pics of how you did it.
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1986 Volkswagen Vanagon Westfalia "Von Westy"
Honda K24A converversion-Road Testing Phase
3-Speed Automatic

Von Westy YouTube Channel
https://www.youtube.com/channel/UCbhyZYxJEQrUuLnMbLleeIA