OK, my Janitrol heater has now failed the decay test and is removed by the a&p doing other work on my front engine. Curious on options others have done. I need heat (turbo I usually fly high, and it has been very cold recently without a heater at 21K in November

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Looking for cost effective options, because I am already having to handle an engine overhaul right now in the pocketbook.
Again, looking for all options and comments please. either her, or email me at
rmorris@agsi.us
Thanks,
Robert