Thermo Sash IIIe
All doors with the 22"-25" adjustment range are now non-returnable.
  • Endura Flap
  • Dual pane insulation
  • Spring loaded design
  • Draft Stopper
  • FREE SHIPPING

Note Endura Flaps™ are not recommended for use by kittens or tiny dogs.
Your window's track width has to be at least 1"
#PP-07PPC06
Thermo Sash IIIe #6
Flap Dimensions: 6" x 11"
Height to Raise Window: 18.5"
Regular Price - $512.99
Sale Price - $359.00
Colors: 
 
Adjustment Ranges: 
 
Quantity:  
  #PP-07PPC08
Thermo Sash IIIe #8
Flap Dimensions: 8" x 15"
Height to Raise Window: 22.5"

Regular Price - $541.99
Sale Price - $379.00
Colors: 
 
Adjustment Ranges: 
 
Quantity:  
  #PP-07PPC10
Thermo Sash IIIe #10
Flap Dimensions: 10" x 19"
Height to Raise Window: 26.5"

Regular Price - $598.99
Sale Price - $419.00
Colors: 
 
Adjustment Ranges: 
 
Quantity:  
  #PP-07PPC12
Thermo Sash IIIe #12
Flap Dimensions: 12" x 23"
Height to Raise Window: 30.5"
Non-returnable in all adjustment ranges.

Regular Price - $684.99
Sale Price - $479.00
Colors: 
 
Adjustment Ranges: 
 
Quantity:  

The Thermo IIIe Sash Window Pet Door
The Thermo-Sash IIIe uses the Endura Flap pet door flap which is a high performance flap that is so well designed that it is guaranteed for 15 years. This window door is dual pane and uses insulated Low E glass which is the best performing glass on the market today and is guaranteed for 10 years on the Thermo-Sash IIIe. Unit is spring loaded so installation is quick and easy without the use of tools.

A draft stopper is in place to prevent air from coming in between the two windows. The door is adjustable of a range between 22” – 43” at 3” increments but your track width has to be at least 1”.

100% Designed, engineered and manufactured in the U.S.A.
Adjustment Ranges:
  • 22"-25"
  • 25"-28"
  • 28"-31"
  • 31"-34"
  • 34"-37"
  • 37"-40"
  • 40"-43"
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    New Customer Service Hours:
    Mon - Th: 9:00am - 11:00pm EST
    Fri - Sun: 9:00am - 7:00pm EST
    If you have any questions just give us a call: 800-957-5753