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

I have crank windows that open outward. This worked just fine on mine. All that I had to do was reverse the instructions. Worked great keeping the heat out and the cool in during the summer very easy to install, only about 15mins or so. The velcro is small enough as to not stick out when the adapter isn't in use. It didn't rip when I moved it along the window when I installed it. Seemed pretty thick, probably well enough made to be used for multiple years to come. The zipper being double ended gave enough for the vent and the drain tubing to go out the window. Great for use in a home that only needs a portable AC occasionally.

We bought a new house, immediately moved in and a month later had our first baby. On top of all this commotion the water heater broke and flooded the house. Needless to say we were stressed as was our piggy bank. Flash forward and the weather starts heating up. We knew this house had no air conditioning and not a single ceiling fan in sight but the casement windows were a surprise. We rushed to find a solution to utilize our standing air conditioning and keep our baby cool. This product did just that! Takes a moment to read the directions and conceptualize the application especially for us since our windows crank out but once we figured it out, it worked perfectly. I was worried about a complete seal especially with the rain but we've had some major thunderstorms lately and there's been no issue whatsoever. We have since hired a company to install wall split units but until then this product saved us time, money, and stress. Thank you!

This works pretty well for my vertical window that faces out, and it wasn’t too complicated to install. The only issue is the tube—it’s kind of hard to turn, so it doesn’t sit perfectly in the window, which makes it feel a bit less effective. Still, after looking through a bunch of air conditioner attachments, this was the best option I could find.

I ordered this for the bedroom above the garage that is always hot during the summer. I had a portable unit from my daughter's college days but thought it would be impossible to use because I have casement windows. I had been looking at other ventless AC units on Amazon when I came upon this window seal solution. It works great! I got it in the mail on Saturday and installed it on Sunday. Easy install. 10 to 15 minutes max. Got an email message from the supplier HOOMEE asking if I needed help installing it, but I had already done it before I got the message and the link to an instruction video. The printed directions that came with the seal were very self explanatory, but it did help to see the photos other reviews had posted to see it on the window. My only issue was of my own making. I did not contact HOOMEE before I ordered a size to see how exactly to determine the size you needed. I just based it on a review I saw and looked at their window size. LOVE, LOVE, LOVE this product. A inexpensive and quick fix to use a portable AC unit with casement windows. Would recommend it without hesitation. My window still closes properly with the window seal installed and it hold my exhaust tube properly when in use or not in use. It comes with ties to attach the hose to the zippers of the seal to make sure it all stays together and secure. Best $ I think I have ever spent to make my home more comfortable for guests using that bedroom.

The HOOMEE Window Seal for Portable Air Conditioner wasn’t as good as I was hoping. While it does the job of sealing the window, it required too much taping to get it installed properly. The process was more time-consuming and cumbersome than I expected, which was a bit disappointing. It might work well for some setups, but in my case, it wasn’t as convenient as I had hoped. I wouldn’t recommend it if you’re looking for a quick and easy solution.

I bought this after freezing all winter to accommodate a vent in an outward-opening casement window in my basement. Prior to buying this, the room would be FREEZING with the window cracked just enough to accommodate the 4" vent, even with blinds drawn and insulated blackout curtains.This thing is incredibly effective at keeping out the cold! The material of the seal is thin, but it can be 30°F out and my room is as warm as if the window were shut. Very impressed. I'm still using the blinds and curtains for light control-- YMMV if you used it in a bare window.Haven't owned it through hot temperatures yet, but so far very pleased with the purchase. Install was easy. Have not noticed any water or critters getting in, despite it being in a deep window well.

1) Received the order, and shortly after I received an email from the seller to the effect of "don't use it in rain cause it will leak". Umm ok, so that means literary half the summer my AC would be un-usable!!!!??2) Instructions are literary missing entire step lol. They show you to velcro the window that in my case opens outwards. That's it. Well, there is a step 2 where you need to velcro all around the fixed window frame as well, so that 1 part of the cloth attached to the window and another to the window frame. That's completely missing from the provided printed instructions / I figured it out but why should I3) If you have any obstructions whatsoever, big or small, you really can't velcro onto them / around them so basically I have a level which is used to open the window, and where the lever is I have no choice but to have a gap - so I guess it'll be all kinds of bugs and heat and what not coming through thereAll in all while a product like that is needed in the market this particular thing is just about useless