Measure your pet's shoulder height — the highest point on their back, not their head — and add 1–2 inches. That's your minimum flap height. High Tech Pet medium pet doors fit dogs up to 130 lbs. If you're between sizes, go up — a door that's a little large is always better than one that's too small. Call 1-800-255-1279 and our team will help you find the right fit.

For maximum security and smart features, the Power Pet Roll-Up is the best medium automatic dog door available — motorized, Wi-Fi enabled, collar activated, and airtight. For a proven automatic option, the Power Pet Classic Wi-Fi is a top-selling choice. For a no-power manual door with outstanding weather sealing, the Dura Flex is unmatched. All are available in medium size across door, wall, and patio mount types.

Patio inserts are the easiest installation of all three types — they slide directly into your existing sliding glass door track with no cutting, no drilling, and no contractor required. Door mount takes about 20 minutes with basic tools and requires cutting through an existing door. Wall mount requires cutting through your wall and filling it with the included aluminum tunnel, typically a 1–2 hour project.

High Tech Pet automatic doors are collar activated. Each door comes with an ultrasonic collar — simply turn on the door and put the collar on your dog. The door's sensors detect when a pet wearing the collar approaches and opens automatically. No training or programming needed. Pets without a collar cannot open the door, keeping strays and wildlife out. You can also control the door via Wi-Fi app (on Wi-Fi models) to set schedules, lock the door, and monitor activity.

Both are premium manual pet doors with 12½" × 25" flaps for dogs up to 130 lbs, heavy-gauge aluminum construction, and rare-earth magnet seals. The Dura Flex specifically uses a rare earth point-magnet system along the entire flap perimeter for a tighter, more weatherproof seal — tested airtight in winds up to 50 mph. If you live in a cold, windy, or wet climate, the Dura Flex is the stronger choice. For milder climates, both perform exceptionally well.

Measure your dog's shoulder height — the highest point on their back — and add 1–2 inches. That's the minimum flap height you need. Extra Large doors have a 12½" × 25" flap, suitable for most dogs up to 130 lbs. If you're unsure, call 1-800-255-1279 and our team will confirm the right fit for your breed.