I have been running mine on the furnace set at 40 for the last two weeks to avoid the need to winterize before I make my move to Texas this week. Avg nite temps have been around 25 but last night dove to 12. Lines are drained but not blown out or winterized. I did pour about 1/2 gallon of anti freeze down each tank and filled the grey water drain lines at each faucet to keep them from freezing up solid. So far no problems, but I'll reserve judgement until I refill the system later this week and test for leaks.
In two weeks, I have blown thru a full 30# bottle and am working on my second.
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