The patio pet door with the Endura Flap, the best pet door ever made!
The Thermo Panel III Patio Pet Door uses the Endura Flap, the best pet door flap ever made. The benefits of the Endura Flap are far more important than whether the glass is single pane or dual pane. Now introducing the Thermo Panel IIIe - All of the features of the Thermo Panel III with the addition of "Low E" glass for the insulated glass units. Low E glass consists of a special coating on the inside of the unit, which greatly improves the energy efficiency of the insulated glass unit.
Dimensions:
- Flap: 6" Wide x 11" Tall
- Rise Adjustment Range: 3" - 5" Rise
- Rise is the height of the bottom of the pet door above the ground. The height that your pet must step over to use the pet door. We suggest that 'flap height' plus 'rise' should about equal pet shoulder height. This dimension is extremely important!
- Overall Panel Width: 11 1/4"
Features:
- Extreme Performance 'Endura' flap - The best pet door flap ever made. Tired of replacing worn out, leaking flaps? You owe it to yourself to investigate the Endura Flap.

- Patented, exclusive 'User Adjustable Rise' - Lets the user easily adjust the height of the flap above the base of the pet door to fit taller or shorter dogs (see graphic). This greatly increases the flexibility of the pet door for the future.

- 'High Aspect Ratio' design: Much easier to fit your pet. Improves security for medium to large sized pets. Easier to share with a smaller pet.
- User-adjustable magnet strength: Optional magnet kits allow the customer to increase wind resistance or reduce magnet pull for training. Each kit will contain 2 sets of magnets (top and bottom) plus installation clips and instructions.
- 'Green' flap material: Safe for the environment.
- "Low E", dual-pane, insulated glass: Complements the insulating properties of the 'Endura' flap.
- 'No Tools' Installation. No need to drill holes in your sliding glass door frame.
- Sturdy Locking Cover - Locks pets in or out. Easy to use clip lock is better than the old spring-loaded pin locks.
- 'Spring load' design: Can be installed and removed in seconds.
- Built in 'Anti-Whoops' allows for 3/4" change in adjustment range to accommodate measuring errors.
- This product comes complete with one Draft Stopper. For extra insulation, many customers prefer using a second Draft Stopper (available for purchase separately).
- 100% Designed and Manufactured in the USA

When you order a custom height panel you provide us with your track height measurement in the shopping cart section. We will design a panel especially for you with a height adjustment range of 3" that has your measurement approximately in the center of that range.
Custom orders cannot be resold. Therefore, they must be a final sale once built. Note that the insulated glass units for custom height orders take about two weeks for delivery from the tempering plant and that we need about one more week to schedule the assembly after the glass unit arrives.
Hot Tip: People almost always visually over-estimate the width of the flap needed by their dog. To avoid this problem, call the dog through a doorway opened only enough for him to comfortably pass. Then measure the gap. The model number corresponds to the width of the flap opening.
Then measure the height of the dog at the withers (top of the shoulder). Inspect the chart to the right to ensure that your pet is no taller than the maximum height value available for that model. If your pet is taller than the maximum or if you need a shorter rise (for another, smaller pet for example) go up to a larger size.
We strongly recommend that you not exceed the maximum height values for your pet.
