Not a gret idea. & S) O9 e6 ^4 z+ V5 R, u, V5 m8 N7 W! Q0 y" g8 w
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.% O/ m0 m" [5 T+ [2 C1 @. i
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Beside,furnace hot water coil is made of metal. Some of it will come into the hot water.