AC Window Seal, Portable Universal Window Kit for Mobile Air Conditioner Unit and Tumble Dryer 400cm/158Inch,Hot Air Stop Air Exchange Guards with Zip and Adhesive Fastener

I didn't realise the difference this would make 2 get the best from my air conditioning unit

I have been using it for three months already and I can say it works. Although when it rains some drops might get it, but nothing too serious and I think that's expected.

Does the job. But not the best shape for the window. Did not come with any instructions on how to install which would have been helpful.

Very easy to stick on it does the job

We've had other brands in the past that were much better but they don't seem to be around anymore, so we decided to try YIFOV.We let the apartment get up to a toasty 29 degrees before running the air conditioner for an hour. We did this twice, once with the window seal on and once without the window seal by only having the exhaust hang out the window.After an hour of running, both methods had the apartment down to 19 degrees so I don't really know what the seal is supposed to be doing here.Just to be on the safe side, we've ordered another seal just to make sure it wasn't a faulty unit. If it makes a difference then I'll edit this review.

Really easy to use kit to enable a hose to go through the window while blocking warm air from coming back in. This kit fits the length specified, and was a very competitive price. Works well to do it's job, and the zip makes it more efficient than other types

Doesn’t fit round window fully and also doesn’t allow the window to open much.

Good item easy set up you just have to measure the size of the window and stick it on. Before that, it is worth cleaning the window frame