Not a gret idea. 4 w$ m0 N" W+ e8 P$ L- d) w- r9 B8 t3 R, o1 V
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 x0 s! Z- I, u& _0 c! `
" ~6 D8 @, X8 N( G$ E0 M8 EBeside,furnace hot water coil is made of metal. Some of it will come into the hot water.