12-16-15, 09:46 PM
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#1
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Journeyman EcoRenovator
Join Date: Oct 2011
Location: Cincinnati ohio
Posts: 338
Thanks: 40
Thanked 35 Times in 31 Posts
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A very good read..
https://www.ipfw.edu/dotAsset/239446.pdf
Lots of info although it is r-134a and not 290 but it still has a lot of info
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