Not a gret idea. ' s/ a9 b* O/ K: M& V% z* `6 o! ]& y( t8 a" K8 m, H
Hot water has went through all your home's internal pipes whereas cold water comes "direct" from your local reservoir. Which should be pretty safe.4 T7 U8 ~( V1 O8 s+ {$ [
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Beside,furnace hot water coil is made of metal. Some of it will come into the hot water.