AtomTrainer,
Sounds like an awesome plan! I believe you will find that propane works well in a system designed for R-22. However, it doesn't behave exactly the same as R-22, so a little tweaking is needed to get what you want out of the system. Since you will be using REAL r-290, your test results would be very valuable to this forum. Those of us running BBQ grill gas in comparable systems would have a benchmark, so to speak.
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