If you have a sash window that slides up and down, you're in luck! The Patio Pacific Thermo Sash IIIe Insulated Sash Window Pet Door is a quick and easy way to give your pet access without having to do an installation in a door or wall.
Features:
- Dual Pane, Insulated Low "E" Glass - The highest performing glass available!
- Includes the award-winning "Endura" pet door flap--the best engineered high performance pet door flap ever made
- No Tools installation - Spring Load design can be installed and removed in seconds
- Exclusive -Built-In "Anti-Whoops" allows for 3/4" change in adjustment range to allow for small measuring errors.
- Draft Stopper - Keeps air from coming in between the two windows.
- Adjustment Ranges accommodate windows 22" - 43" wide in 3" increments. Be sure your track width is at least 1".
- 100% Designed, Engineered and Manufactured in the U.S.A.
- The "Endura" flap itself is guaranteed for 15 years. The glass panel unit is guaranteed for 10 years.
- Optional window lock available below
Note: Endura Flaps are not recommended for use by kittens or tiny dogs.
Available Door Flap Sizes

6" x 11"
8" x 15"
10" x 19"
12" x 23"
Required Window Opening Height (your window must raise open at least this high for panel to fit):
For 6" x 11" flap: 18.5"H
For 8" x 15" flap: 22.5"H
For 10" x 19" flap: 26.5"H
For 12" x 22" flap: 30.5"H

Thermo Sash IIIe in White Color with Slide-in Locking Cover in Place

Thermo Sash IIIe in Satin Aluminum Color

Thermo Sash IIIe in Bronze Color



- The Endura Flap is soft, flexible and safe.
- Superior low temperature performance!
- Seals tightly against weather
- Insulates like dual pane glass
- Specially treated with a powerful UV retardant to help prevent yellowing or cracking in the sun
- Remains flexible in very low temperatures
- Extreme resistance to wind
- Visually Clear - flap is not tinted
- Environmentally friendly - uses a polyolefin-based polymer (similar to material used in food storage containers) which is a non-toxic material that is recyclable and safe for the environment
- Superbly engineered
- Made in the USA

Dual Pane Insulated Flap with Heat Transfer Barriers

Insulation - The Endura Flap consists of a sealed unit that is slightly thicker than a dual-pane glass unit and provides comparable insulation qualities.
Heat Transfer Barriers - Heat transfer across an air space in a sealed unit is caused by air currents moving within the space. These currents are caused by the continuous heating and cooling of the air inside the unit. The Endura Flap is divided by horizontal barriers which serve to reduce the effect of these air currents.
Adjustable Magnets On Both Edges and at Threshold

Wind Resistance and Training
The worst performance a pet door can have is when it blows open in the wind. Then it's really leaking a lot of air!
The Endura flap pet door has been proven in a wind tunnel to resist blowing open in winds in excess of 50 mph! In the same comparison testing, two of the largest selling pet doors on the market blew open at approximately 20 mph. (One was in the high 'teens', the other in the low 20's).
Nearly all customers have been satisfied with Endura flap wind resistance "out of the box". However, magnet kits are available to further increase wind resistance. Each size will accept up to two additional magnet pairs across the bottom of the flap which increases the magnet strength in that area by 50% to 300% depending upon the size of the flap.
Some users would like the flap to be easier to push open while training. The Endura flap design allows for temporary elimination of magnets on the sides as well as across the bottom.
When these magnets are removed, the Endura flap is extremely easy to push and the floating threshold remains in the low position.
The Endura Flap Pivots!
.jpg)
