Bee Vac Question - Time before unoccupied Broodcomb suffers Chillbrood

[Grandma_DOG]

I've a few cutouts and a few wretched butcheries. So I'm building a Bee Vac.

Once I Vac the bees I wondered about my time issues. How long can the brood comb survive before it fatally chills?

Can I Vac bees, pop the brood in a box, drive it for a few hours and then put the bees back in.  What about 12 hours?  Surely 24 hours kills it?

[Cindi]

An answer is required.  Beautiful days in our great lives, health.  Cindi

[Robo]

I can't give you an exact time,  but what works well for me is that I cut out the brood comb, put it in frames and put the frames in a polystyrene nuc with attached bees.   I have gone 6-8 hours with this method without issue, and expect could go longer.  With my bee vac, I add the brood to the bees in the vac before I travel home.

Obviously outside temperature plays a big part, but I don't attempt cut-outs when the temperature is too low.