I have told some people that I would do a cut out on a large hive in a storage building on Monday morning. The hive is between studs that are spaced @ 24" and the propolis squeezing out of the siding is about 6 ' tall. The owners say the hive has been there for at least 5 years. The weather has changed and it will probably be a little cool on Monday morning. I think it will be around 50 degrees when starting out. My question is how can I keep the brood warm while vacuuming off the bees and transferring the comb to the hive? I had a thought of putting a heating pad under the box but I do not know if that will be sufficient. Any suggestions?