Not a gret idea. 8 L7 O, ^8 ]5 r' t4 L# \6 ]& @3 D5 N; y% T
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.7 L2 q" n: Y9 ^0 \
7 f" [ @$ j: z) Y$ | F: NBeside,furnace hot water coil is made of metal. Some of it will come into the hot water.