Ideal "Fast Sash" Pet Doors For Windows


  • The top choice for an affordable window pet door solution
  • Simple installation requires no tools, perfect for renters or vacation homes
  • Proves to be easy for pets of all sizes to use with clear, flexible flaps
  • Adjusts to fit any size window within 5 ranges
  • Covered by a 1 year warranty
  • PLEASE NOTE: This product ships directly from the manufacturer and may take 3-5 business days before it actually ships.

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Stock No: 07RI

Availability: In stock

Price From: $150
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Price From: $150
Ideal "Fast Sash" Pet Doors For Windows
Our pet door smoothly fit into any window for a quick and easy installation.

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  • The top choice for an affordable window pet door solution
  • Simple installation requires no tools, perfect for renters or vacation homes
  • Proves to be easy for pets of all sizes to use with clear, flexible flaps
  • Adjusts to fit any size window within 5 ranges
  • Covered by a 1 year warranty
  • PLEASE NOTE: This product ships directly from the manufacturer and may take 3-5 business days before it actually ships.
Flap SizeFlap DimensionHeight to Raise WindowStock No 
Small5" x 7"13 3/4"07RI02 
Medium7" x 11 1/4""17 7/8"07RI03 
Extra Large10 1/2" x 15"21 15/16"07RI05 

Don't know which flap size to get? Here is a measurement guide to help you out

Adjustment Ranges

  • 23" - 28"Custom Order (not available for Extra Large)
  • 27" - 32"Custom Order
  • 33" - 38"
  • 37" - 42"Custom Order
  • 40" - 45"Custom Order
  • 45" - 50"Custom Order

Final Sales   Adjustment Ranges other than 33" - 38" are final sales and cannot be returned. Custom positioning options are also final sale and cannot be returned.

Ideal Fast Sash For Windows

This cat and dog door for sash windows is one of the most versatile and economical solutions out there. The spring-loaded design fits windows of almost any size, and it perfect for a temporary or semi-permanent installation. There is no doubt that this is the best choice if you want a good product on a budget!

Features of the Fast Sash

  • Clear vinyl flaps range from Small to Xlarge, and incorporate a magnetic strip at the bottom to help keep it sealed.
  • The single pane glass is optimal for moderate or less extreme climates.
  • Renters love this model, spring loaded design on each end makes installation or removal a breeze, without the use of any tools.
  • Multiple adjustment ranges will fit windows from 23” all the way up to 50” in width (adjustment ranges other than 33” - 38” are custom final sales and non-returnable).
  • Locking cover included allowing you to close off the pet door when not in use (note that the door slides in from the top on the inside of the house, so be careful to check and see if there is anything above it that would interfere).
  • The frame is white aluminum and will fit into tracks as small as 7/8” wide.

Perfect Time for an Ideal Sash

  • Your dog or cat is smaller or more timid than most. If that is the case the clear vinyl flap is easy to use and much more user friendly your pets.
  • Dog door for window can be shared with a smaller pet, as the flaps are not as tough to push through even in the larger sizes.
  • Not having to use tools means no holes drilled that would ruin the window track and cost you your deposit.
  • This is one of the only sashes for dogs that won’t break the bank.

PLEASE NOTE: This product ships directly from the manufacturer and may take 3-5 business days before it actually ships.

Customer Reviews

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  • Cats are happy review by Diane
    5 4 Cats are happy

    We have a screened porch that the cats love. When the weather is mild we can leave the door open and they can go in and out. But it's been cold and they still want to go out. The Fast Sash Pet Door for windows installed easily and the cats were going in an out within a few hours. Using the enclosed insulation helped with the air leaks around the whole thing.

    (Posted on 1/24/2019)

  • Purrfect Product review by Louisa
    5 5 Purrfect Product

    I had an Ideal Fast Sash Pet Door custom made for my Mom's Crazy cat "Little Boy". He is always getting stuck out on the front porch(my Mom forgets he's out, she's very ill) I check on her severeal times a day and night (she live in out guest house). Any ways the day I installed this door, Little Boy was going in and out for over 3 hours. Thank you for making a product that always cat/dogs to come and go as they please and not go so stir crazy.

    (Posted on 12/5/2018)

  • Great Product review by Connie
    5 5 Great Product

    I was looking for a product so my Carine Terrier could go in and out of the house during the daytime, instead of staying in doors and being lazy all day. He loves it, and it only took him about 24 hours to figure out how to go in and out the Window with the help of Moms step stool set up, so he could reach the window. Now he's in and out all day long. when we come home he's usually outside sunning in the backyard. I definitely recommend this product for anyone who needs a solution in getting their pet outside and exercised. It was quick and easy to install.

    (Posted on 8/31/2018)

  • Pet Door Sash for my window review by Frank
    5 5 Pet Door Sash for my window

    We really love our new pet door sash for our window. It fit in perfectly and does everything we hoped it would do. More importantly than that, our cats figured it out after just a few days. The cats can now go on and out whenever they want. It is especially important now that summer has arrived and we keep the air conditioning running throughout the day. I expect that our electric bill will improve as we no longer have the cool air escaping through the open window. Overall. We are very happy with our purchase and highly recommend it. Our cats, Marcia and Samson recommend it as well.

    (Posted on 6/21/2018)

  • Working great review by Craig
    5 4 Working great

    Thanks for a great pet door

    (Posted on 1/21/2018)

  • Best purchase ever review by Judy
    5 5 Best purchase ever

    Our cat can’t seem to get enough of the outdoors but doesn’t wander...just in and out and in and out all day and night. He would sit at the door and howl to be let out. Then after being in for 10 minutes, he’d find me and pester me until I let him out again.
    This easy to install solution makes us both So happy.
    It is a sturdy, well made product and our Shadow is in and out day and night when ever he feels like it.
    We had some workers here and had to keep the cat inside for a day. The easy to use door lock worked fine.
    It seems that this company has thought of everything to make this product exactly what we needed.
    In summary, well designed, well thought out, easy to install, sturdy, and worth every penny!

    (Posted on 1/13/2018)

  • Works well, easy install, not flush right review by Trinity
    5 4 Works well, easy install, not flush right

    The wrong door was initially shipped, and the right side door is not flush right, more just off center. But Customer Service was great and the corrected order was sent right away and the install was easy. It's a great product. The door closure is designed to prevent raccoons and other animals from being able to open it, which is a huge plus where I live. I would recommend this product.

    (Posted on 1/2/2018)

  • Love it. So easy. review by Dorinda
    5 5 Love it. So easy.

    i have used these for over a decade now and I love them. They are so easy to put in the window! The soft plastic door can start to tear at the top but only with heavy use and traffic, and replacements are available and easy. I have several dogs, so my door takes on a lot of use. Great product!

    (Posted on 12/29/2017)

  • Great door for the price! review by Rebecca
    5 5 Great door for the price!

    This is awesome, especially for renters. I wanted to give my cat access to the backyard without damaging the house. The installation and removal were quick and easy. I got the medium size because I have a fat cat.

    (Posted on 12/27/2017)

  • innovative review by Linn
    5 4 innovative

    Soft flap, easy install, and is very clean looking. .the best part is we can take it out whenever we want, especially at night or in the cold winter.

    (Posted on 12/5/2017)

  • Nice door but... review by Joe
    5 4 Nice door but...

    Received the door but it didn't come with hardware to lock the window in place. Apparently that's a separate purchase that I would have ordered but didn't see it as a suggested add-on.

    (Posted on 10/24/2017)

  • Wonderful product review by Barbara
    5 5 Wonderful product

    This pet door is easy to install, well made, and looks good, unlike some other window sash pet do.ors. Soft flap is essential for cat's safety I and my cat are very happy.

    (Posted on 10/6/2017)

  • 2 cats review by Aubrey
    5 4 2 cats

    My cats love their new found independence. We used to leave a people door cracked out to our screened pool area for them to go out when they wanted to, which in Florida also means more hot air in. Plus we would close it at night and when we ran errands. Not anymore! We can leave our people door closed, and the cats can come and go as much as they please. My only concern was locking it in so someone can't reach in and take it out and come on in the house. The company that makes the pet door sent a flier detailing a "locking pin" they sell separately for another $9.00
    For $200.00 I think that should have been enclosed. However, the pet door should pay for itself over time just in the savings from the electric bill! Yay! It took them maybe 2 days before they got used to it. And now going in and out is like an adventure!!

    (Posted on 8/4/2017)

  • Highly Recommend! review by Santo
    5 5 Highly Recommend!

    Fast ship, great quality, looks great in window and should work quite well once my cat gets used to it.

    Thanks PetDoors!

    (Posted on 7/28/2017)

  • perfect window-door between house and screened porch review by Lisa
    5 5 perfect window-door between house and screened porch

    After I had a porch on my house screened in, I wanted to let the cats come and go as they pleased. This perfectly meets our needs. Now that the cats have figured it out and only act a little scared of it before leaping through (it took them a couple of days to work up the courage), the cat door gets a fair amount of use.

    It arrived quickly, and was super easy to install. Well worth whatever it is I paid for it.

    (Posted on 7/19/2017)

  • Hooray!! Dog is using the pet door review by Karen
    5 4 Hooray!! Dog is using the pet door

    We have a rat terrier....a very stubborn one. He NEVER lets you know when e wants out. Put this in the window.... built him a small platform on both sides and he's happy now (after some coaxing). He now understands his new freedom and can take his toys in and out.
    We don't have to be mind readers anymore.
    The only thing I wish could be changed without spending $400+ is a slightly sturdier frame. Our windows are heavy. We added extra bracing. Eventhough this is considered a cat door...since my dog is only 17lbs. and does not go through the door with a large amount of thrust this work for us. the door.

    (Posted on 6/17/2017)

  • The perfect solution for my cats! review by Jacqueline
    5 5 The perfect solution for my cats!

    This window pet door is the best solution to have my 2 cats come & go outside to our screened in patio area!
    The window pet door was extremely easy to install -- took just minutes! Now I don't need to open my patio door for the cats-- more sleep for me!!

    (Posted on 5/19/2017)

  • Perfect review by Steve
    5 5 Perfect

    Great product, fit perfectly in the window.

    (Posted on 5/14/2017)

  • I love it! review by Anna
    5 5 I love it!

    Thank you for accommodate to my needs. my kitties have not used it yet, but they will learn. thank you!

    (Posted on 4/23/2017)

  • Fantastically easy to install review by Barbara
    5 5 Fantastically easy to install

    I bought the 27 to 32 size by mistake; the Customer Service person got on the phone with the manufacturer to get me the size I needed, so the right size arrived and went in beautifully. Great company to work with, excellent products.

    (Posted on 2/24/2017)

  • My cats are to smart or red lock not good enough! review by TLM
    5 2 My cats are to smart or red lock not good enough!

    Loved the idea, especially the in without being anle to go back out when we leave for the evening and they are not around. Well, both cats figured out a way to get it open. So we would bring in and lock it with no in/out and they figured out how to jimmy that open too! For the price I paid it is useless for us to use. Back to opening the garage for the day, hunt before leaving at night, and tons of leaves to blow out in the fall. :-(

    (Posted on 1/20/2017)

  • See above review by Janey
    5 3 See above

    Well after a good 7 months the racoon's figured out how to use the cat door so i had to take it out. The microchip is the way to go for my 2 cats I think. Only way to keep them out.

    (Posted on 9/19/2016)

  • love it review by kitty4
    5 4 love it

    Perfect for our small dog and our fattest cat!
    Only downfall is heavy winds blow it open.

    (Posted on 3/28/2016)

  • cat door review by yoyo
    5 5 cat door

    We love it. The cats are getting used to it. It takes them a while since they are cats and we know how they are. Most go in and out with no problems as they have gotten used to the door that they can see through. Also had to get used to the new odor. We highly recommend this door to any cat who needs one.

    (Posted on 2/22/2016)

  • Love this door review by Jeanster
    5 5 Love this door

    Love this pet door. I got the door because one of my furbabies, Demo, was refusing to use the litter box inside. He wanted to use the great outdoors like his doggie brother and sister. This gives Demo the freedom to go outside and now I no longer have to clean up after him. I only give it 4 stars because the adjustable sides are a bit flimsy.

    (Posted on 11/28/2015)

  • Life Saver!! review by Carol
    5 5 Life Saver!!

    We love our pet window! It give the dogs the freedom to go in and out as they need to! Easy to install and they learned quickly how to go in and out of it!

    (Posted on 10/2/2015)

  • better than expected review by SO
    5 5 better than expected

    This door took 5 minutes to install and my dog learned to use it in another 2 minutes. Those 7 minutes have freed me from having to go home to let her out, or to clean up broken glass when she lunged at squirrels from inside the house...

    She's been using the door very frequently for about three months now and there have been zero problems with it. If only my cat would learn how to use it...

    (Posted on 6/22/2015)

  • I'd buy it again! review by Charlotte
    5 5 I'd buy it again!

    Great door. It took my 16 year-old daughter 10 minutes to install. My two dogs, an English Springer Spaniel and a Siberian Husky rough-house everyday, bolting in and out of this door. They slam into it and both try to fit through at the same time while they are play fighting. Still working great after three months of this. I like that it closes with a magnet vice a mechanized lock. The dogs learned to use it in two days, well it took the husky two days. The Springer took about 30 minutes.

    (Posted on 2/14/2015)

  • Great! review by Jim
    5 5 Great!

    All 4 cats including the 18 pounder use the medium cat window. Easy to install and fits well.

    (Posted on 12/28/2014)

  • Very Pleased!!!!!. review by Karen
    5 5 Very Pleased!!!!!.

    Love it. I have large door. My dogs are Yellow Lab, Maltese and tiny Silky Terrior. They all use it with no problems. Very happy with this product. And it looks really good because of side windows.

    (Posted on 10/9/2014)

  • Window Doggie Door review by Bailey
    5 5 Window Doggie Door

    We love our window Doggie door. It installed in seconds, took only a few minutes to train our dog and POOF he's outside enjoying the sun and the birds. We have floor to ceiling windows but if I lived in a house with higher windows I'd still use this product and use doggie stairs (like you use for a bed) so he could get in and out.

    (Posted on 8/16/2014)

  • The best solution!! review by leaveittolinda
    5 5 The best solution!!

    No where to install a pet door, so the window pet door was the perfect training neccessary.Andy knew exactly what to do right after it was installed. (which is super simple) My window is elevated a little off the floor, so I did have to create a "step" on the outside of the house......would highly recommend this product!

    (Posted on 7/1/2014)

  • Great product review by Boo
    5 5 Great product

    It took me almost a year to finally spend the money for this pet door-I wished I had done it sooner! I have a very active Vizla who wants in/out/in/out/in/out , you get the picture. It took about 20 minutes of bribing her with treats to push through the clear flap. We did put a plastic tote on the outside so she didn't have a big drop off from the window sill. No problems with installation and pleased with fit in the window. We have had this door in place for at least 6 months of constant use and have no complaints. I highly reccommend this door for those of you get tired of the in/out game.

    (Posted on 6/11/2014)

  • Excellent product! review by Mike
    5 5 Excellent product!

    Good price.Easy to install.Quality merchadise. Our chuweenie wiil use her medium size dog door even when the people door is open!

    (Posted on 5/19/2014)

  • Awesome door! review by Lisa
    5 5 Awesome door!

    I bought 2 for my dogs! One is in the front the other is in the back! The dogs come and go when ever they like! They fit perfectly and are very simple to put in! I added window locks at the top of the windows so no one can pull the windows open. I love these windows! My dogs do also! Unfortunately the UPS delivery man does not! Lol

    (Posted on 5/9/2014)

  • GREAT! review by Tess
    5 5 GREAT!

    I bought one of these pet windows 4 years ago.

    I have moved and taken it with me. I love it. My cats love it.

    It's a great product. I have used it in 2 different windows and had no problems installing. It is durable and easy to clean.

    (Posted on 4/28/2014)

  • Wonderful review by PW
    5 5 Wonderful

    Love this window insert with dog door. Great addition to any home with a window and a dog.

    (Posted on 3/13/2014)

  • Flap not so good review by Jeff
    5 3 Flap not so good

    Sorry not very happy with the dog door itself, the flap has a gap in it that runs all the way around and does not seal. Lets a lot of air from the outside come in. Other dog doors I've used utilize a flap that mats to the other that seals so air can't come in.

    (Posted on 2/4/2014)

  • Love my door review by Max the Dog
    5 5 Love my door

    I am Max, the Dog. They got me this door to go in the window so I could get in and out when I want too. I love it! It is the perfect size for me. I have learned to hit it at almost full speed and it opens and snaps shut every time.
    It keeps the cold air out and seals right up. My people had it out of the box and installed in less than 5 mins. Took me even less to figure out how to use it, but I am smarter than they are.
    Bottom line, I love it. No more sitting with my legs crossed while they try to figure out I need to go outside or having to wait for commercials for someone to get up and open the door.
    Thanks for a great door for me!

    (Posted on 11/24/2013)

  • Great dog door! review by Wirrage
    5 5 Great dog door!

    We have been really happy with this dog door. Install was a breeze and we haven't had a single issue. It's been great having the dogs come and go as they please. No regrets whatsoever!

    (Posted on 9/7/2013)

  • Love it review by TraciD
    5 5 Love it

    I don't know why I didn't purchase this sooner. My cockapoo loves this door and uses it all the time. It was so easy to install and has been working great for months.

    (Posted on 8/19/2013)

  • Life Saver! review by Nlundschen
    5 5 Life Saver!

    I bought this for my puppy as the getting up and down while I was recovering from surgery just wasn't going to be easy. She was potty trained all ready and learned very quickly to use the door. There were no accidents, she feels independent and can go out and bark at the cats and squirrels. I feel free of the up and downs and my recovery has progressed nicely.

    (Posted on 7/15/2013)

  • Great dog door that offers peace of mind review by Peace of mind
    5 5 Great dog door that offers peace of mind

    This was the second "fast sash" window I ordered from America's Finest Pet Doors. It arrived on time and is so easy to install. I have four dogs and need to keep them separate, so with the two sash doors I can give my dogs access to different yards. These pet doors fit great in the windows and are also easy to move if needed.

    (Posted on 4/29/2013)

Weight 40.0000
Manufacturer Ideal Pet Products
Your Maximum Pet Size Cats, Large Cats, Small Dogs, Medium Dogs
Type of Window Sash (Up & Down)
Climate Suitability Mild or Utility
Sealing Value Low
Wind Resistance Low
Color White
Frame Material Extruded Aluminum
Insulation Value Low
Flap Material Vinyl
Flap Design Single, One Part , Flexible, Thin Flap
Flap Colors Clear
Flap Thickness 1/8"
Replacement Flaps Available Yes
Dual or Single Pane Single Pane 1/8" Thick
Ability to Lock Flap Separate Locking Cover-Loads from Top
Locking Cover Material ABS Plastic
Can Be Installed In Sash Windows
Warranty Period 1 year
Return Period 30 days
Manufacturer's Restocking Fee 0

The Ideal "Fast Sash" Installation

Click below to expand:

For the ideal fast sash pet door for windows you need to check 3 things: Track width, Height you can raise the window, How wide the window is from left to right.

No, they are made with ⅛” thick single pane glass.

Yes, it comes with a locking cover that slides in from the top of the sash window.  You will need to double check to make sure that there is no lip sticking out on the frame that closes down on top of the sash pet door because that would get in the way of sliding in the cover.

Return period is within 30 days, and there is a 15% restocking fee. However, adjustment ranges other than 33" - 38" are final sales.  Window mount pet door sashes where the cat door has been ordered to the right or to the left.

You will want to measure the width of your window track to determine the adjustment range you need; measure from deep inside the window track on the left, to deep inside the window track on the right.

The track needs to be at least 7/8" wide for the Ideal Sash Windows. If your track is thicker than 1 ¼ inches, you may consider putting in shims in the window frame to make the sash more stable in the frame.

You can trim the flanges using a jig saw with a metal cutting blade or a hacksaw.  On these models you can can trim both sides if you need to which gives you about 1-¾” of wiggle room for mis-measures.

The door features single pane glass which is optimal for moderate or less extreme climates.

There is nothing permanent about it! The the window sash cat door uses a spring-loaded design to fit windows of almost any size, and is perfect for temporary or semi-permanent installation. Installing the door requires no tools.

The flap is a clear vinyl which is designed to be easy to use for your pets.

If you go with the 27-32” range, you can add space on either side using shims. If you go with the 33-38” range, and that is too big, up to 1” can be trimmed off of either side of the door to make it fit.

Window sash cat doors can be a little difficult for timid pets at first. Encourage your cats to go through the door by holding the flap open for them at first, and beckoning them through with the offer of treats on the other side. Repeat the process several time while gradually lowering the flap, so it begins to graze their back as they pass through and they get used to using the flap itself.

The sash comes standard with the flap in the center position, however you can order a custom-mount door so it is on the left or the right.

Even though most customer use this as a window sash cat door larger pets can use it too. Dog door for windows would just need to be ordered in one of the larger sizes, just make sure that your window opens up high enough to get it in the track. Ideal dog door in window flap dimensions only go up to 10.5"w x 15"h, so it is really important to measure your pets.

The sash is actually aluminum, but it can be used in vinyl windows as long as all the dimensions line up.

It will. There are many window manufacturers with different designs. You may need to shim or install a stop to ensure the pet door is securely installed in your window.

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One Year Warranty And Disclaimer

The new and revised warranty that follows this disclaimer supersedes any and all previous warranties of whatever nature or description, whether express, implied or set by law. Any unexpired warranties shall now be governed by the terms of the new warranty for the duration of the existing warranty’s unexpired term.
Ideal’s pet doors are very durable and with the proper care will provide many years of service for you and your pet. Thank you for selecting Ideal for your pet door. However, please be aware the pet doors are not waterproof against inclement weather or any excessive water exposure. The one year warranty set forth below applies to Ideal’s pet door(s). 
This product has a One Year Warranty from the date of the purchase of the product to be free of manufacturer’s defects in workmanship and materials. This express One Year Warranty is limited only to the original purchaser of the product and is non-transferable. Satisfactory proof of purchase must be provided to the manufacturer for this one year warranty to apply.  In that case, the manufacturer will replace at no charge to the purchaser the defective part(s). No refunds will be provided to the purchaser. No service contract is being provided under this One Year Warranty. Proof of purchase so that the One Year Warranty may be honored must be made to:
Ideal Pet Products, Inc.
24735 Avenue Rockefeller
Valencia, California, USA 91355
Attention: Warranty Department
(661) 294-2266 / 1-877-IDEALPET (433-2573)
Any and all implied warranties are expressly disclaimed and of no force or effect. These warranties include, but are not limited to, the implied warranties of merchantability, implied fitness for any intended purpose, and any warranties under the California Song-Beverly Consumer Act.  
This One Year Warranty is void if damage is due to improper installation, intentional misuse or abuse, repairs by anyone other than the manufacturer, the failure to follow manufacturer’s instructions, or if the product is being used for commercial purposes. Purchaser assumes all risks and liabilities for the misuse or abuse of the product, the commercial use of the product or the failure to follow manufacturer’s instructions.
This One Year Warranty only applies if the product is used for domesticated animals. The Manufacturer, Ideal, is not responsible and shall not have any liability for any damage to or defects caused by acts of god, criminal activity, dog abuse including, but not limited to chewing on the door, lightening, abuse, alteration, trespassing, children’s use of the product, unauthorized access, entry by non-domesticated or “stray” animals, or any other unintended use or misuse of the product.
The Manufacturer, Ideal, disclaims and excludes any liability for incidental, consequential, punitive, general, special or other damages arising out of or connected with the purchase, use, or misuse of the product or concerning any warranty herein.
This One Year Warranty shall be governed by the laws of the State of California, USA. Venue shall be with the Los Angeles Superior Court, North Valley District.
This product, or any of its accessories, parts, or attachments may not prevent adults, children, animals, insects, or objects from passing through or using the opening created by the product.
Ideal Pet Products will not be liable for any unintended or accidental usage, misuse, abuse, criminal conduct, water intrusion, acts of god, damages or injuries occurring or accruing from the use of this product except in strict accordance with Ideal's One Year Warranty accompanying the sale of this product to the original purchaser.