When I bought my immersion copper wort chiller the coils were all compacted down so that the stack of copper coils were all touching each other. In this state, the chiller only covered about half of the wort in my 40 quart brew pot. Ever since the first time I used it, I have expanded, or uncoiled, the chiller so that the coils covered from the bottom of the pot to the top of the wort when chilling. The coils are no longer touching each other in a stack when I do this.
Is it more efficient to use the chiller in the compacted mode or expanded? or does it even make a difference? How does everyone else use their chillers?