Yep, if you circulate the heated water all the way down to the end of the pipe(s) it should stay thawed.
I contemplated doing a circulating system, but decided it was too complex to bother with.
Went with this...
My run is not totally predator proof so I wanted a lock on it, didn't want to have to walk into the coop to lock it.....then I saw a vid with that type lock and just had to tinker one together.
Depends on what you have trying to dig in.
I'd use something stouter that chicken wire, it will last longer.
If you have weasels or rats, use 1/2" HC or 14ga 1/2" x 1" cage wire.....and bury it a foot or so or they may get in under the apron.
Do the roof of run same as walls...many can climb.
Cover the open windows with HC too.
Oh, and..take a look at my rope operated pop door with auto lock on my coop page.
Cool!
Is there a 'ceiling' on the coop area?
If the building is not predator proof, that chicken wire on the coop walls is iffy.
What's with those windows hinged at bottom....is that in the coop are or outside of it.
Curious about ramp to window into run, looking forward to seeing more.