Anywhere from 15 to 19 C should be fine for WLP029. I wouldn't go any colder than 15 C, and 16-17 C would be better if you can do it.Out of interest, if you were going to make a kolsch with 029, would you ferment it warmer? I ferment it cool as im using it for clean ales. Ive never fermented it warmer than 15c. Im out at the moment but i'll definately end up buying more, so i might try it warmer in a kolsch