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Dragon Double Flap Pet Door for Windows

White Dragon Double Flap Pet Door for Windows from the front, showing the two flaps open.
White Dragon Double Flap Pet Door for Windows from the front, showing the two flaps tilted open.
White Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
 White Dragon Double Flap Pet Door for Windows from the back, showing the two flaps open.
White Dragon Double Flap Pet Door for Windows from the back, showing the two flaps tilted open.
White Dragon Double Flap Pet Door for Windows from the back, with the locking cover in place.
White Dragon Double Flap Pet Door for Windows from the side, showing the two flaps open.
White Dragon Double Flap Pet Door for Windows from the side, showing the two flaps tilted open.
White Dragon Double Flap Pet Door for Windows from the side, with the locking cover in place.
White Dragon Double Flap Pet Door for Windows from the top, showing the two flaps closed.
White Dragon Double Flap Pet Door for Windows from the front, showing the two flaps closed.
Black Dragon Double Flap Pet Door for Windows from the front, showing the two flaps open.
Black Dragon Double Flap Pet Door for Windows from the front, showing the two flaps tilted open.
Black Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
Black Dragon Double Flap Pet Door for Windows from the back, showing the two flaps open.
Black Dragon Double Flap Pet Door for Windows from the back, showing the two flaps tilted open.
Black Dragon Double Flap Pet Door for Windows from the back, with the locking cover in place.
Black Dragon Double Flap Pet Door for Windows from the side, showing the two flaps open.
Black Dragon Double Flap Pet Door for Windows from the side, showing the two flaps tilted open.
Black Dragon Double Flap Pet Door for Windows from the side, with the locking cover in place.
White Dragon Double Flap Pet Door for Windows from the front, showing the two flaps tilted open.
White Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
Black Dragon Double Flap Pet Door for Windows from the side, showing the two flaps tilted open.
White Dragon Double Flap Pet Door for Windows from the front, showing the two flaps closed.
White Dragon Double Flap Pet Door for Windows from the back, showing the two flaps closed.
Black Dragon Double Flap Pet Door for Windows from the front, showing the two flaps closed.
Black Dragon Double Flap Pet Door for Windows from the back, showing the two flaps closed.
White Dragon Double Flap Pet Door for Windows from the side, showing the two flaps closed.
Black Dragon Double Flap Pet Door for Windows from the side, showing the two flaps closed.
White Dragon Double Flap Pet Door for Windows from the back, showing the two flaps open.
White Dragon Double Flap Pet Door for Windows from the back, with the locking cover in place.
White Dragon Double Flap Pet Door for Windows from the side, showing the two flaps tilted open.
Black Dragon Double Flap Pet Door for Windows from the front, showing the two flaps open.
Black Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
Black Dragon Double Flap Pet Door for Windows from the back, showing the two flaps open.
Black Dragon Double Flap Pet Door for Windows from the back, with the locking cover in place.
Black Dragon Double Flap Pet Door for Windows from the front, showing the two flaps closed.
Medium Dragon Double Flap Pet Door for Windows from the back, with the locking cover in place.
Large Dragon Double Flap Pet Door for Windows from the back, showing the two flaps tilted open.
Large Dragon Double Flap Pet Door for Windows from the back, with the locking cover in place.
Black Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
Medium Dragon Double Flap Pet Door for Windows from the front, showing the two flaps tilted open.
Small Dragon Double Flap Pet Door for Windows from the side, showing the two flaps tilted open.
Medium Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
Large Dragon Double Flap Pet Door for Windows from the side, showing the two flaps tilted open.
Large Dragon Double Flap Pet Door for Windows from the front, with the locking cover in place.
Medium Dragon Double Flap Pet Door for Windows from the front, showing the two flaps closed.
Medium Dragon Double Flap Pet Door for Windows from the back, showing the two flaps tilted open.
A white Dragon brand double flap pet door insert for windows, front view with locking cover. The door features a durable aluminum frame and UV-resistant additives for weather protection.
A white Dragon brand double flap pet door insert for windows, front view without locking cover. The door features an efficient double flap design with magnets to keep the flap securely shut when not in use.
A black Dragon brand double flap pet door insert for windows, tilted open. The door is easy to tilt open, even for small pets.
A black Dragon brand double flap pet door insert for windows, tilted open with locking cover. The door comes with a sturdy black locking cover to block access when needed.
A black Dragon brand double flap pet door insert for windows, front view with locking cover. The door is available in black or white to match your existing window frame.
A black Dragon brand double flap pet door insert for windows, tilted open. The door features a flexible polyolefin elastomer flap that is easy for pets of all sizes to access.
A close-up of a black Dragon brand double flap pet door insert for windows, tilted open. The door's double flap design provides excellent sealing and energy-efficiency.
A white Dragon brand double flap pet door insert for windows, tilted open with locking cover. The door offers versatile installation options, as it can be mounted in regular doors, walls, and various window types.
A white Dragon brand double flap pet door insert for windows, front view with locking cover. The door is spring-loaded for quick and easy installation, making it an ideal choice for renters or vacation homes.
A white Dragon brand double flap pet door insert for windows, front view without locking cover. The door is designed to fit side-sliding windows with tracks that are 34"–37" or 46"–49" tall.
A black Dragon brand double flap pet door insert for windows, front view. The door features a durable aluminum frame and UV-resistant additives for weather protection.
Black Dragon double flap pet door for windows, front view with locking cover. Durable aluminum frame with UV-resistant additives for weather protection.
Black Dragon double flap pet door for windows, tilted open with locking cover. Versatile installation options for regular doors, walls, and various window types.
Black Dragon double flap pet door for windows, close-up of flap. Flexible polyolefin elastomer flap is easy for pets of all sizes to access.
White Dragon double flap pet door for windows, front view. Efficient double flap design maximizes insulation and seals pet door opening.
White Dragon double flap pet door for windows, front view with locking cover. Spring-loaded installation mechanism for quick and easy setup.
White Dragon double flap pet door for windows, tilted open. Designed to fit side-sliding windows with tracks 34"–37" or 46"–49" tall.
White Dragon double flap pet door for windows, tilted open with locking cover. Replacement flaps available for easy maintenance.
White Dragon double flap pet door for windows, close-up of flap. Double flap design with magnets provides excellent sealing and energy-efficiency.
Black Dragon double flap pet door for windows, tilted open with locking cover. Sturdy, black locking cover for added security when needed.
Black Dragon double flap pet door for windows, tilted open with locking cover. Sturdy, black locking cover for added security when needed.
Black Dragon double flap pet door for windows, tilted open.
Black Dragon double flap pet door for windows, tilted open.
Dragon Double Flap Pet Door for Windows
Dragon Double Flap Pet Door for Windows

Dragon Double Flap Pet Door for Windows

Regular price
$309.99
Sale price
$309.99
Regular price
Sold out
Unit price
per 
White
Black

How to Measure This field is required.

  • Flexible window compatibility: The Dragon Window Pet Door Double Flap fits side-sliding windows with tracks 34"–37" or 46"–49" tall
  • Energy-efficient design: Double flap system maximizes insulation and seals pet door opening effectively
  • Easy installation: Spring-loaded mechanism allows for quick setup and removal, ideal for renters and vacation homes
  • Durable construction: Aluminum frame with UV-resistant additives ensures long-lasting weather protection
  • Enhanced security: Includes a black locking cover for added safety when needed
  • Approximately one month to build your custom pet door; reach out to our customer service team for expedited shipping options

Product Details


The Dragon Window Pet Door Double Flap is designed for pet owners seeking an innovative solution for their side-sliding windows. This adjustable panel insert fits window tracks 34"–37" or 46"–49" tall, accommodating a variety of window sizes. The patio panel also fits window tracks at least 1" wide. Its double-flap design ensures excellent insulation and sealing, helping to keep your home comfortable while minimizing energy costs.

The Dragon Window Pet Door is built with a durable aluminum frame and UV-resistant additives, providing long-lasting weather protection. The flexible polyolefin elastomer flap is easy for pets of all sizes to use, and the built-in magnets keep the flap securely closed when not in use. With a spring-loaded installation mechanism, this pet door is perfect for renters and vacation homes, as it requires no drilling or cutting.

Not only can the Dragon Window Pet Door be installed in regular doors and walls, but it's also compatible with various window types, offering versatile installation options. Replacement flaps are available for easy maintenance, ensuring your pet door remains functional and energy-efficient. For added security, a sturdy black locking cover is included, allowing you to block access when necessary.

Experience the benefits of a pet door without compromising insulation or security. The Dragon Window Pet Door Double Flap's combination of durability, energy efficiency, and ease of installation makes it an excellent choice for pet owners in search of a reliable window pet door solution.

Live in a mild climate? Check out the Dragon Single Flap Pet Door For Windows

Features:

  • Adjustable height range: Suitable for window tracks 34"–37" or 46"–49" tall, accommodating various side-sliding windows
  • Double flap system: Efficient insulation and sealing properties, perfect for keeping your home's energy costs low
  • Spring-loaded installation: Quick and easy setup without drilling or cutting, making it a great option for temporary installations
  • Sturdy aluminum frame: Built with UV-resistant additives to withstand weather damage and provide long-lasting use
  • Black locking cover: Offers added security by blocking pet access when needed

Size Chart

Flap Dimensions:

3 5/8"w x 9"h

The entry way your dog goes through.

Step Over Range

3"

Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
flap dimensions
step-over range
overall panel width

Overall Panel Width

12 5/16"

How wide the panel is overall.

Flap Dimensions:

7 1/16"w x 13 1/16"h

The entry way your dog goes through.

Step Over Range

3”

Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
flap dimensions
step-over range
overall panel width

Overall Panel Width

13 5/8"

How wide the panel is overall.

Flap Dimensions:

9 3/8"w x 16 9/16"h

The entry way your dog goes through.

Step Over Range

3”

Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
flap dimensions
step-over range
overall panel width

Overall Panel Width

16 5/16"

How wide the panel is overall.
Flap SizeFlap DimensionsStep OverOverall Panel WidthRecommended Pet Height*
Small3 5/8"w x 9"h3"12 5/16"9" - 12"
Medium7 1/16"w x 13 1/16"h3"13 5/8"11" - 16"
Large9 3/8"w x 16 9/16"h3"16 5/16"11" - 22"

*measured from the ground to the tallest point of their back.

IMPORTANT SIZING INFORMATION

The Dragon Pet Door’s two-piece flap is designed to tear away for your pet’s safety. If you pet door is not the right size for your pet, they may break off flap during normal use. Follow these sizing tips to help ensure that you are buying the right Dragon Pet Door size:

  • Check the Flap Height: You must measure your dog before purchasing a pet door. A large dog may not fit in a “large” pet door. The tallest point of your dog’s back should be at least 1” beneath the top of the flap. 
  • Check the Step-Over: Your pet should be able to over the bottom of the flap comfortably. If the distance from the floor to the bottom of the pet door (called the stepover) is too high, your dog’s paw may catch in the pet door’s U-gasket. It’s better to have a taller pet door that is lower to the ground than a smaller pet door that is too high up.
  • Check Your Entry/Exit Level: The inside of your home may be higher than the ground outside. This means that your door may have different step-over heights depending on whether you are indoors or outdoors. Try to use the lower level when picking your step over height. You can also even of the different levels with a ramp or platform. 
  • Reinforce Your Flap: Every Dragon Pet Door comes with instructions for how to reinforce the screws keeping your flap in place. If you are worried in any way that your pet may rip off the flap, we recommend preemptively reinforcing your flap. Note that doing so will negate the teat-away safety feature. 

If you have any questions about which size pet door your pet needs, please contact our team of pet door experts for guidance and recommendations. 

Find The Best Pet Door Size For My Pet

A

Pet Height: inches

B

Pet Width: inches

Please fill the above fields.

Installation Instructions

installation video image
Installation icon Difficulty Easy
Installation icon Steps 04
Installation icon Time Required 0.5 Hours
Installation icon Sections 02
Installation icon Flags 00

Parts

  • 1 Window Insert with a Pre-Installed Dragon Pet Door
  • 1 Foam Weather Strip Seal
  • 1 Locking Cover

Tools

  • Flathead Screwdriver

Please read instructions & notes thoroughly before installation.

Step 1 Release Spring Mechanism

  • Loosen the height adjustment locks at the end of the pet door insert with a screwdriver. This allows the spring mechanism to move freely up and down.

Step 2 Insert Into Window Track

  • Before applying weatherstripping, insert the panel into the top track of your framing.
  • Push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
  • If you can’t quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
  • If the panel still doesn't fit, see the FAQ for guidance.

Step 3 Apply Weather-Stripping

  • Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
  • Apply the foam weatherstripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres.
  • Use scissors to trim the strip to fit the length of your panel.
  • Flip the panel around to apply on the other edge.

Step 4 Lock Into Track

  • Place the panel back into the window, then tighten the height adjustment locks to lock it in place.

LOCKING YOUR WINDOW

Since you likely can no longer use your window’s original lock, we have provided you with an alternative locking method to keep your home secure.

Installing the track clamp:

This clamp has a thumbscrew that tightens by hand to prevent the sliding window pane from moving beyond the clamp’s placement. For windows manufactured with the slider on the inside track, the lock can usually be installed on the raised track.

If you aren’t able to use the lock that comes with the panel:

A great alternative to locking your window is a charley bar or dowel in the track. Both work off the same concept - they block the slider from opening. When engaged you cannot pull the sliding pane away from the pet door panel. If there is 15” or more of space for the sliding pane to move, a Charley bar will work. If there’s less, a dowel is necessary.

FREQUENTLY ASKED QUESTIONS

What if my panel is slightly too tall?

You can trim up to 3/4” off the spring- loaded adjustment piece at the top. This can be done by removing the adjustment pieces with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low or you will not be able to put the top back on.

top

The dark area marks where you can trim:

top

What if my panel is slightly too short?

We offer height extensions that will add 3/4” to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.

You can also make your own extension out of nominal 1” wood (which is 3/4” thick), such as a 1x3, if you need more than %" in height. Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.

 

What if the panel is wobbling slightly back and forth?

If your track is wider than 1” you can use small wooden shims or extra weather-stripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.

FAQ

Is this window pet door easy to install?

Yes, this window dog door can be installed in a matter of minutes.

Are sliding window pet doors secure?

Yes, Dragon sliding window pet doors are secure in your window track. You can also purchase a Charley Bar for added security. 

Do you sell any replacement flaps?

Yes, we carry replacement flaps for the sliding window pet door.

Can my large and small dog share this pet door?

Yes, but before you purchase, make sure to follow sizing guidelines and measure your pet before purchasing. Make sure the size of the door is based off your tallest pet, but installed low enough for your smallest pet.

How do I know what size will be best for my dog?

You want to make sure that the top of your new pet door clears your dog's back by 1-2 inches minimum. Make sure the step-over is less than 1/3 of your dog's height in order to ensure that the pet door is as comfortable for your dog to use as possible. Lastly you want the width of the door to be wide enough to allow your dog and cat to go through without touching the sides. Here's a guide on how to measure your pet with tips on how to determine the correct size.

I want to get the large pet door for my dog, but I am worried that a burglar could fit through it.

Every Dragon Pet Door comes with a locking cover. This cover can be used to keep your dog in as well as keep intruders from entering your home.

Is there a difference between the single flap and the double flap?

The double flap option provides increased insulation against the cold. Both options have magnets on the flap to keep the door sealed in wind. The Dragon door double flap is a great choice for colder climates. 

Warranty

Dragon Pet Doors One Year Warranty

Dragon Pet Doors have a one-year warranty for normal wear and tear and manufacturing defects.

Customer Reviews

Dragon Double Flap Pet Door for Windows

White / Small / 34" - 37" Edit

Dragon Double Flap Pet Door for Windows

Size Chart

Flap Dimensions:

3 5/8"w x 9"h

The entry way your dog goes through.

Step Over Range

3"

Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
flap dimensions
step-over range
overall panel width

Overall Panel Width

12 5/16"

How wide the panel is overall.

Flap Dimensions:

7 1/16"w x 13 1/16"h

The entry way your dog goes through.

Step Over Range

3”

Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
flap dimensions
step-over range
overall panel width

Overall Panel Width

13 5/8"

How wide the panel is overall.

Flap Dimensions:

9 3/8"w x 16 9/16"h

The entry way your dog goes through.

Step Over Range

3”

Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
flap dimensions
step-over range
overall panel width

Overall Panel Width

16 5/16"

How wide the panel is overall.
Flap SizeFlap DimensionsStep OverOverall Panel WidthRecommended Pet Height*
Small3 5/8"w x 9"h3"12 5/16"9" - 12"
Medium7 1/16"w x 13 1/16"h3"13 5/8"11" - 16"
Large9 3/8"w x 16 9/16"h3"16 5/16"11" - 22"

*measured from the ground to the tallest point of their back.

IMPORTANT SIZING INFORMATION

The Dragon Pet Door’s two-piece flap is designed to tear away for your pet’s safety. If you pet door is not the right size for your pet, they may break off flap during normal use. Follow these sizing tips to help ensure that you are buying the right Dragon Pet Door size:

  • Check the Flap Height: You must measure your dog before purchasing a pet door. A large dog may not fit in a “large” pet door. The tallest point of your dog’s back should be at least 1” beneath the top of the flap. 
  • Check the Step-Over: Your pet should be able to over the bottom of the flap comfortably. If the distance from the floor to the bottom of the pet door (called the stepover) is too high, your dog’s paw may catch in the pet door’s U-gasket. It’s better to have a taller pet door that is lower to the ground than a smaller pet door that is too high up.
  • Check Your Entry/Exit Level: The inside of your home may be higher than the ground outside. This means that your door may have different step-over heights depending on whether you are indoors or outdoors. Try to use the lower level when picking your step over height. You can also even of the different levels with a ramp or platform. 
  • Reinforce Your Flap: Every Dragon Pet Door comes with instructions for how to reinforce the screws keeping your flap in place. If you are worried in any way that your pet may rip off the flap, we recommend preemptively reinforcing your flap. Note that doing so will negate the teat-away safety feature. 

If you have any questions about which size pet door your pet needs, please contact our team of pet door experts for guidance and recommendations. 

Find The Best Pet Door Size For My Pet

A

Pet Height: inches

B

Pet Width: inches

Please fill the above fields.

installation video image
Installation icon Difficulty Easy
Installation icon Steps 04
Installation icon Time Required 0.5 Hours
Installation icon Sections 02
Installation icon Flags 00

Parts

  • 1 Window Insert with a Pre-Installed Dragon Pet Door
  • 1 Foam Weather Strip Seal
  • 1 Locking Cover

Tools

  • Flathead Screwdriver

Please read instructions & notes thoroughly before installation.

Step 1 Release Spring Mechanism

  • Loosen the height adjustment locks at the end of the pet door insert with a screwdriver. This allows the spring mechanism to move freely up and down.

Step 2 Insert Into Window Track

  • Before applying weatherstripping, insert the panel into the top track of your framing.
  • Push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
  • If you can’t quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
  • If the panel still doesn't fit, see the FAQ for guidance.

Step 3 Apply Weather-Stripping

  • Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
  • Apply the foam weatherstripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres.
  • Use scissors to trim the strip to fit the length of your panel.
  • Flip the panel around to apply on the other edge.

Step 4 Lock Into Track

  • Place the panel back into the window, then tighten the height adjustment locks to lock it in place.

LOCKING YOUR WINDOW

Since you likely can no longer use your window’s original lock, we have provided you with an alternative locking method to keep your home secure.

Installing the track clamp:

This clamp has a thumbscrew that tightens by hand to prevent the sliding window pane from moving beyond the clamp’s placement. For windows manufactured with the slider on the inside track, the lock can usually be installed on the raised track.

If you aren’t able to use the lock that comes with the panel:

A great alternative to locking your window is a charley bar or dowel in the track. Both work off the same concept - they block the slider from opening. When engaged you cannot pull the sliding pane away from the pet door panel. If there is 15” or more of space for the sliding pane to move, a Charley bar will work. If there’s less, a dowel is necessary.

FREQUENTLY ASKED QUESTIONS

What if my panel is slightly too tall?

You can trim up to 3/4” off the spring- loaded adjustment piece at the top. This can be done by removing the adjustment pieces with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low or you will not be able to put the top back on.

top

The dark area marks where you can trim:

top

What if my panel is slightly too short?

We offer height extensions that will add 3/4” to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.

You can also make your own extension out of nominal 1” wood (which is 3/4” thick), such as a 1x3, if you need more than %" in height. Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.

 

What if the panel is wobbling slightly back and forth?

If your track is wider than 1” you can use small wooden shims or extra weather-stripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.

FAQ

Is this window pet door easy to install?

Yes, this window dog door can be installed in a matter of minutes.

Are sliding window pet doors secure?

Yes, Dragon sliding window pet doors are secure in your window track. You can also purchase a Charley Bar for added security. 

Do you sell any replacement flaps?

Yes, we carry replacement flaps for the sliding window pet door.

Can my large and small dog share this pet door?

Yes, but before you purchase, make sure to follow sizing guidelines and measure your pet before purchasing. Make sure the size of the door is based off your tallest pet, but installed low enough for your smallest pet.

How do I know what size will be best for my dog?

You want to make sure that the top of your new pet door clears your dog's back by 1-2 inches minimum. Make sure the step-over is less than 1/3 of your dog's height in order to ensure that the pet door is as comfortable for your dog to use as possible. Lastly you want the width of the door to be wide enough to allow your dog and cat to go through without touching the sides. Here's a guide on how to measure your pet with tips on how to determine the correct size.

I want to get the large pet door for my dog, but I am worried that a burglar could fit through it.

Every Dragon Pet Door comes with a locking cover. This cover can be used to keep your dog in as well as keep intruders from entering your home.

Is there a difference between the single flap and the double flap?

The double flap option provides increased insulation against the cold. Both options have magnets on the flap to keep the door sealed in wind. The Dragon door double flap is a great choice for colder climates. 

Warranty

Dragon Pet Doors One Year Warranty

Dragon Pet Doors have a one-year warranty for normal wear and tear and manufacturing defects.