Endura Pet Door
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Patio Pacific Patio Pet Door With Endura Flap

Patio Sliding Glass Door Insert With Endura Pet Door Installed

"Endura" Flap Thermo Panel IIIe
Patio Pet Door for Sliding Glass Doors

  •    New! "Low E", Dual-pane, Insulated glass: Complements the insulating properties of the 'Endura' flap even more than in the original Thermo Panel III.

  •   New! Award Winning 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. 

  •   New! 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.

    •   # 6 may be set to 3" or 5" rise

    •   # 8 may be set to 3", 5", or 7" rise

    •  # 10 may be set to 3", 5", 7" or 9" rise

    •  # 12 may be set to 3", 5", 7", 9" or 11" rise

  •   New! '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.

  •   New! 'Green' flap material:  Safe for the environment unlike vinyl (PVC) which is not.

  •  'No Tools' Installation. No need to drill holes in your sliding glass door frame.

  •  New!  Provision to add magnets to increase the already significant wind resistance.

  •  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 or to accommodate a too tight fit.

  •  100% Designed, Engineered and Manufactured in the USA

  •  Available in sizes to fit any sliding glass door (minimum track width 1"):
    Standard ranges include 74
    3/4" - 77 3/4" and 771/4"-801/4"
    Standard 'Oversize' is 93
    Custom height ranges include:3
    Custom under size < 74
    1/4"  (especially for sideways sliding windows)
    Custom oversize 80

  •  Draft Stopper - Stops air leaks between the stationary and sliding panels.

  •  Provision to lock sliding glass door and pet flap securely with a pin' type lock.

  •   Superior Customer Protection:  90 day return, 10 year warranty, 15 year warranty on the "Endura" flap assembly

The Endura Flap Pet Door for Sliding Glass Doors -
The Original Thermo Panel III Patio Pet Door -
 was a major upgrade to the very successful Thermo Panel II. The difference was that the Thermo Panel III used the new award winning "Endura" flap--the best pet door flap ever made--while the Thermo Panel II used flaps and framing made by other manufacturers. 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.

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. 


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.

Note: Endura Flaps are not recommended for use by kittens or very small dogs. Cats have been successful using the #06, however a few have found the #08 difficult to use. We would not recommend using the #10 or #12 for cats.

Buy Now Click Here to purchase an Endura Thermo Panel for sliding glass doors.



Size and Stock

Flap Dimension
Rise Adjustment Range
Overall Panel Width

 # 6
 # 8
 8"x15"  3"-7"  131/4" $459
 # 10
 10" x 19"  3"-9" 151/4"
 # 12
 12" x 23"  3"-11" 171/4"
 Frame Colors:  
S - Satin (aluminum)
B - Bronze (dark brown) 
W -White
Height Options: 
P - 74
3/4" -  77 3/4
Q - 77
1/4" -  80 1/4"
R - 93
1/4"-961/4" (add cost)
 Frame color and height options
are offered from a drop down after you 'Buy Now'

RISE - is the height of the flap above the base of the pet door. We suggest that 'flap height' + 'rise' should about equal pet shoulder height. Unlike any other panel pet door on the market, the Thermo Panel IIIe can be adjusted by the user to the rise dimensions shown in 2" increments.

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 three to four weeks for delivery from the tempering plant and that we need about 1-2 weeks to schedule the assembly after the glass unit arrives.

Buy Now Click Here to purchase an Endura Thermo Panel for sliding glass doors.

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