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Old 11-05-2012, 05:26 AM   #4
LuciferMutt
Rides slow bike slow
 
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Joined: Aug 2008
Location: New(er) Mexico
Oddometer: 10,893
20s and 30s you say? If you can get the interior up to 75-80* in one shot then leave it, you'd probably have 48 hours or so if the house is reasonably well insulated. My crappily insulated house will drop from 72 to 58 in about 10 hours with the heat turned off when it's in the 20s outside. Otherwise, I agree with shutting the supply off and draining everything you can and using just a touch of RV antifreeze in each drain.
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