Not a gret idea.% v4 z" D8 @9 ]( m
7 h4 i7 w) a9 e
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. & e% L6 N$ z( S 5 m6 _% D# v9 J5 tBeside,furnace hot water coil is made of metal. Some of it will come into the hot water.