Grainfather Conical Fermenter + small batch

[Suicid]

Hi folks!
Questions for GF Conical Fermenter owners.
Have you guys tried and can say how badly cooling efficiency suffers for <15L batches (when the wort/beer is below the cooling sleeve)? will it chill at all (by cooling the inner walls)?

I'm not looking for cold crash obviously, but I'd be happy if Conical could at least keep 18c-20c while active fermentation.

Thanks in advance and cheers!

 

[jschein]

Check out this, Smudgey did all the work
https://www.homebrewtalk.com/thread...-fermenter-owners-thread.673743/#post-8838235