Kept my 1.5 ton red and white ferments at the temps I wanted (73 and 65 respectively.) I used it with a tiny glycol chiller (maybe a 2 gallon tank made to keep beer kegs cold that I got for $900--not a proper big ol' glycol chiller). Had tried to keep ferments cold with this chiller and the small cooling snake MoreWinemaking sells--which works great for cold stabilizing in stainless drums--but did not do anything for ferments. So I was worried this might not make a difference but it did. Very happy to have it.