How much time would I have to pick up eggs before they are destroyed by cold in a chicken coop of 10

[DocumentedPure]

I am concerned about how often I will have to run out to the coop to pick up eggs when it is really cold. I want to see what my options are besides adding a heat source. But I do not want to trust hens to be broody when they often are not. I know they do not lay as much during the winter, but I still want to hatch them when they do.

 

[SunHwaKwon]

That's a ways off but they would likely freeze within an hour of being laid, assuming no one else moves into the box to lay. You can still eat them if they freeze, you just need to keep them frozen until you consume them. The other option is to feed ones that break back to the birds.

 

[DocumentedPure]

So what temperature would I have to keep it at in order to not loose hatching eggs?