I am doing an extended secondary on an English Barleywine. I can do it at 66F, same temp as primary OR 50F in the basement closet. Being that this will be a 2-3 month secondary there is much less chance of an airlock accidently getting yanked by a kid if I do it in the basement.
I am aging half of the 5G batch on bourbon soaked oak cubes. The other half just aging. Primary is done (5 weeks- pitched on a large yeast cake). OG was 1.103. Current SG 1.032. That attenuation is about the same for this yeast as I got for the other 2 beers I made with it (~65%. NeoBrittania). So it may drop a point or two in secondary, but I am not concerned if it doesn't. I purged both carboys with CO2. I plan to use some yeast at bottling to carbonate.
Is there any drawback to doing it at the colder temp?