Review on Optimized Baboni Pet Door for Wall - Steel Frame & Telescoping Tunnel - Aluminum Lock - Double Flap Dog and Cat Door - Strong & Durable - Sizes: Small, Medium, Large by Mario Chao

My husband found it harder to install than I thought and we also live in double width which always makes things difficult. The dogs figured it out quickly. Not sure if it lets in much cold air as it's autumn and quite warm. Dachshunds are a bit harder to penetrate due to their long bodies, but they understand that. Fingers crossed that home accidents stop. I'm worried someone stole them while I'm at work. Overall, I'm glad they can get in and out on their own!