400CM (157)Universal Window Seal for Portable Air Conditioner And Tumble Dryer – Works with Every Mobile Air-Conditioning, Easy to Install - Air Exchange Guards With Zip and Adhesive Fastener

I live in NYC, my bedroom is pretty small but has a sliding door out to a lovely balcony which is a gem in the heart of the city. For years, Ive suffered through the hottest days with a ceiling fan because portable ac units have to be vented out. This year, I broke down and bought a portable unit - Im handy and I researched the various ways to vent the hot air out esp since I have shutters so the kit you can buy specifically for patio doors wasnt going to fit flush and all the insulation required to keep it air-tight. Then I can across this product. For the price, I figured it was worth a try. Its easy to install (just make sure you follow instructions and clean the surface you are sticking the velcro on) with no permanent damage ...I wanted my opening on the opposite side so technically it may be on inside out but the zippers are double + on both sides so it works just fine. Is it 100% air-tight? No. - but its close enough that I dont feel the heat coming back in. better yet, I can unzip and use my door w/o obstructions when its not in use. I usually pin the one side open by closing it in the screen or theres enough velcro left over that you could cut a small square and use to keep flaps open when not in use. Once summer is over, I should be able to take down the white part and store for next year. In any case, it perfectly fits my needs!

Worked great with my AC, which I wouldnt have been able to use effectively without it.

I’m staying pretty neutral on my stars. I was going to say this wasn’t easy to put up nor is it convenient to be in a doorway but I realized after reading other reviews they sent me a window one in a door way package! Whoops! I got it up there with some tucking and pulling but I can’t use my door anymore, other than that, it works! Used some duct tape to keep the bugs out

Allows me to use an air conditioner in an unusual window and still close the window when not in use.

What can I say? It works! The installation went exactly like the video for me. Just attach the Velcro to your window and then stick on the HooMee. You need to read the instructions a little carefully when laying out the fabric to make sure youre attaching the right side to the right part of your window, but its fine. I cant speak really to how efficiently it insulates from the outside hot air, but it definitely keeps the exhaust outside so that my apartment doesnt heat up from AC exhaust while the AC is running. Its relatively easy to unstick from the Velcro when I just want to open my window. Or I can unzip it and open my window with it hanging off the window.

Ill start off by saying I am very happy with the way this product has been performing. We have casement windows so ended up purchasing some portable air conditioners and using these window seals to make sure they didnt have to work overly hard to cool the room. So far so good. I am impressed at what a good job theyre doing. However, these are not as easy to install the first time as they make it seem. On their own website they say Install it in just seconds and that is simply not possible. I had to email back and forth with customer service a number of times even after having watched their demonstration videos. Once I got it down the first time, though, the second time WAS a lot easier. Just dont think youre going to be able to unpack this and get it set up quickly without some help.

I was having problems finding one of these for a door i need to use. I have a entertainment room near a back door. i convinced myself that the 400cm would work on it even though this is specifically for a window. It works great. Just make sure that the one you order measures out to the same size you order. In my case the top, bottom and one side measured to 400cm and that is what i got. For 19 bucks it really fits good im glad i got it. If i had bought one for a door i dont think it could have fit much better. Even better if you have a flip over ball and glide type security lock like i do. It keeps the door locked but allows the door to be open about 2 inches. Works great , I like it.

I was worried that the seal wouldnt fit my window for some reason and that I would run into some kind of problem with the install, but everything went smoothly and the product works as described.

Im happy with buying it. The window in one room of our house can not install window AC. We think to change the window. But this is too expensive.I came to my friends house, and I saw she bought a portable air conditioner. It looked very nice and I made up my mind to buy one too. It can good fit our window. Our new portable AC came quickly, but to my disappointment, the panel kits cannot work well for our window. Hot air would come back inside the room, making the bedroom uncomfortably hot and humid. Personally speaking, I dont feel too much the temperature dropped. I bought this window seal. It seems to be high quality but helped immensely, it keeps the windows completely closed throughout my bedroom. I can sleep so much better from then on. Its as our expectations in mind and we have been totally satisfied. By the way, if you are an extreme environmentalist like me, you would find it is a good choice to save the energy. Very creative product.

Having a west facing second story bedroom with a balcony I have suffered through a few summers and thought this might be the answer to adding an AC unit to the room. Unfortunately they didn’t include the Velcro strips to attach this to the door. I’m still hopeful it’ll work… just with a little more effort on my part.