Quote:
Originally Posted by Mikesolar
Why not propylene glycol? Ethylene is way too deadly and is losing market share to propylene and if it is USP grade, a single wall HX is OK in most places. Not so with ethylene, double wall is needed.
I'd be very interested in the results.
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You know as much as I try to not have tunnel vision some time it happens! The chemical guys we work with swear by ethylene, but it would be more green to go propylene! Other reason is the EG is free and I must by the PG.
I think PG will be used, If my Tim Allen toy "as the wife has named this project" were to spring a leak and one of the pets ingested the ethylene myself and the cat will most likely get to meet the maker.
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