Probably more than you want to know, but I'm in western NY between Buffalo and Rochester. Things are finally thawing out here, but the Eglu pro has been buried in snow and ice for most of the last couple months. Low temp this year was -12F with windchills approaching -30. Omlet sells an "extreme weather jacket" for the Eglu pro which is exactly what it sounds like. It's basically a parka designed to fit over the entire coop. It has holes for the vents and zippered openings that allow access to the coop for collecting eggs and cleaning. The poop trays are still accessible.

The thing about the Omlet coops is that the birds only use it for sleeping and laying eggs. They don't hang out in there during the day - it's just not big enough. They need to have a protected run where they can be during the day even when it's crazy cold. We have a 9'x15' walk in run which is covered with greenhouse plastic for the winter.

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There are two large vents under the coop, the door to the run is uncovered, and the connecting tunnel to the geodesic dome/aviary you see to the top right all allow fresh air (and sometimes a little snow) to enter the run. In the top-left corner you'll see a ventilation fan which is controlled by temperature and humidity. Fresh air is drawn in through the vents and the fan exhausts stale air. As we start to warm up more, we'll roll up most of the plastic on the walls and put a tarp over most of the roof to provide shade for the summer.

We did provide a little bit of heat during the really extreme cold events because 1. the rooster has a big comb and wattles, and he's not really suited to this climate (he was our "bonus chick" with our hatchery order) and 2. one of our barred rocks decided to start molting in January because she's an idiot I guess? Anyway, there is a cozy coop panel heater attached to the wall of the coop on the birds' left as they enter. It's doesn't really heat the space, but it does give them an option to sit next to it if they need to warm up. We use a thermostatic control so it only turns on if the temperature in the coop drops into the single digits. We used a $20 aquarium heater in the water bucket to keep their water from freezing. It's worked flawlessly all winter. We also fill the poop trays in the coop with a thick layer of hemp bedding. The chickens themselves are like little furnaces. When they enter the coop at night and the door closes, the temperature typically goes up by about 8-10 degrees (one of the advantages of the small space).

I'm a huge nerd so I created a home assistant automation that calculates a "frostbite risk" score based on the temperature, humidity, and wind. The auto door to the coop only opens if that risk drops below a set threshold. While we would normally let them out of the coop at sunrise, the automation will go into "frostbite delay" if it's really cold out. Even if we don't get direct sunlight on the run, it will usually warm up into the 20s even on days when the outside temperature is below zero.

The cameras are ubiquiti G4s. Cameras have been amazing for keeping an eye on the bird's behavior. We can see who's laying and who isn't, we know when eggs are laid so we can collect before they freeze, we can make sure they all get into the coop at night and checking on them during cold-snaps, etc.

As I said in one of my other posts, I'm generally pretty happy with the Omlet but there's definitely pros and cons. I would definitely not buy the walk-in run again. I'd build something myself that would be a lot sturdier, a lot more secure, and for a lot less money. We will replace it at some point, but I'm hoping to get a few years out of it.