Not a gret idea. : X: C1 C& ]' c- N! @- w0 G, V9 s, i
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.0 C8 @4 V1 T0 L) O' e* j
# |& f6 V# j/ ]* g3 x4 sBeside,furnace hot water coil is made of metal. Some of it will come into the hot water.