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Firewood, Heating and Wood Burning Equipment
so now what !!!! glycol or no glycol??
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<blockquote data-quote="habanero" data-source="post: 767475" data-attributes="member: 12443"><p>You won't loose as much alcohol as you think. Alcohol forms an azeotrope with water that raises it's boiling point considerably. That's why it is really hard to distill absolute ethanol, because you can only get up to about 95% purity before you start boiling the water off too. I don't know off the top of my head what percentage would be stable at normal boiler operating temps, but I'd guess it to be high enough to depress the freezing point enough for the task at hand. If you wanted to get fancy, just put a condenser on your vent and you'd never lose the alcohol-it'd just condense and could be put back into solution.</p><p></p><p>But like I said, this is all really a mute point as it would be smarter in the long run to use glycol-based antifreeze anyway.</p></blockquote><p></p>
[QUOTE="habanero, post: 767475, member: 12443"] You won't loose as much alcohol as you think. Alcohol forms an azeotrope with water that raises it's boiling point considerably. That's why it is really hard to distill absolute ethanol, because you can only get up to about 95% purity before you start boiling the water off too. I don't know off the top of my head what percentage would be stable at normal boiler operating temps, but I'd guess it to be high enough to depress the freezing point enough for the task at hand. If you wanted to get fancy, just put a condenser on your vent and you'd never lose the alcohol-it'd just condense and could be put back into solution. But like I said, this is all really a mute point as it would be smarter in the long run to use glycol-based antifreeze anyway. [/QUOTE]
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