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

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 think I got the wrong size but doesn’t bother me too much lol it works great and not too difficult to install just follow the directions carefully. I didn’t think I could have an ac unit bc of the casement windows but it’s worked great!

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!

Horrible directions. Had to watch the video 20x. Still think it was wrong. If you live where it downpours, itll start leaking through the Velcro and soak your floor.

Installed it during a heatwave and was hopeful that it would work. Unfortunately the seal is not airtight (not surprising as velcro is not airtight.) Our building is designed so that when the windows open the air pressure causes air to rush in, so perhaps that makes it worse. We taped up the entire thing (on both sides of the seal) with vent tape (like metallic duct tape) and that made a huge difference.

I have the most annoying casement windows and it always makes setting up the portable airconditioners very annoying. The Hoomee Universal Seal does a great job of sealing the window from bugs and with the 4 zipper setup, holds the exhaust vent very securely compared to similar brands I have used in prior years.

I discovered this product when I did a search for portable AC window kits that worked with crank windows. It was a DIY blog that suggested this as an option and so I had to see for myself. As a renter I needed something that would not involve drills and affixing plexi glass to windows so this was my best option. So with the installation video on repeat I was able to figure out how to install the kit no problem. As a whole the window kit absolutely serves its purpose the only downside is that if you live in a very city, i.e. traffic and construction noise etc. it is loud. I cant leave the hose in and window open with the kit because it is like having the window open essentially. Even when the exhaust hose in and the AC unit is on, I do hear street noise which is a bummer. Anyway, if you live somewhere quiet, this is a great option. If you live somewhere busy, itll work but note that you will hear outside noise so long as the window is open.

I have pull in windows and I bought this to use with my portable ac to keep the cool air inside. This was really hard to install, I dont know if it was because of my windows, but it was hard to get everything ready. Then after installing it I could still feel some air coming back inside from the zippers, which I already knew would happen but still wanted to give it a chance. At the end I decided to just return it because I wanted to find a better option for my situation, but removing it was another issue. The adhesive removed the paint from my window frame, something to keep in mind if its your situation.

The original window seal that came with the air conditioner I had wasnt waterproof so water came into the seal when it was raining. When I ordered a new one to replace it I picked this because I saw that on the description that this seal is waterproof. When I asked for help for the correct size for my specific window, the seller gave me a quick response and the 400cm window seal they recommended fit my window perfectly. Even the small crack is sealed and there is no hot air or rain coming into the room now. Easy to open and close window, easy to install and a really creative solution. I would recommend this if you have similar issues!

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.