Recroom.... I'm using the MicroOne's in a room that's 21L x 15W x 8H. I know it's not the same size as your room but the room it will end up in is 35L x 18W x 8H.
There's another member here Grr6001 that has a room that's closer to your room specs. Hopefully he can chime in and give his feedback.
I can tell you that I'm not concerned about their performance in the larger room. Currently I'm breaking them in on my 2-channel system. These speakers can handle huge dynamics and can play really loud without any strain.
Jonathan is usually great in reaching back out to customers. Try him at info at bluelightaudio dot com.