How do bees manage to keep a queen cell warmed to the needed 94-5 degreesF in a nuc where only two frames have been placed, including one with queen cell(s)? I'm very curious. I 've read that capped brood emits heat, so maybe that's some help. It seems like the odds of chilling a queen cell are high when you pull it and place it in a two-four frame nuc. Yet I've been successful with this so far - two viable queens produced this year. Those were four frame nucs. Not so sure about 2 frames.