time to cold crash temperature?

[Btaz]

I'm curious to see how long others are seeing it take for the beer to get to the child crashed temperature? I have mine in a new self made fermentation chamber and it seems that it takes about 15-20 hours for it to go from 70 degrees to 37 degrees. The chamber is cold right away, but the thermal transfer is taking longer than I imagined.

 

[thadass]

I would say that's pretty normal. When I cold crash in the winter in my sub-40F basement it usually takes at least a day to get that cold. I usually cold crash 3-7 days, maybe a little longer if I'm using gelatin fining

 

[billl]

The time is really going to depend on your cooling power/method. I'm not sure it really matters though. Just leave it for a few days at the final temp and you'll be fine.