
We live in Michigan where the winters are a bit chilly and our dog walks through a three-season porch into the backyard. It is not necessary to enter a room with a temperature of 5 degrees every morning to let the dog out. The proportions of the storm door leading outside couldn't accommodate this unit (we needed a large one for our nearly 80 pound golden retriever). I ended up installing it in the wall next to the door, which was tricky but doable. Overall I'm happy with the results and it only took a few minutes to get my dog to use it regularly. The magnets in the door are perfect and the dog has no problem opening it. Two of these back to back work great!

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