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❄️ Seal the heat out, save energy, and chill like a pro!
The LYUNIT 300cm Portable Universal AC Window Seal Kit is a durable, UV-resistant, and waterproof solution designed to enhance the cooling efficiency of portable air conditioners. Featuring a no-drill adhesive installation and a robust zipper closure, it prevents warm air infiltration, insect entry, and rainwater leaks. Compatible with most standard windows (excluding side-sliders), it supports eco-conscious energy savings by reducing AC workload and carbon emissions, making it a smart, easy upgrade for any modern home.



| ASIN | B09Q5Y4DXZ |
| Air Conditioner Application | Mobile |
| Best Sellers Rank | 247,126 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 104 in Air Conditioner Parts & Accessories |
| Brand | LYUNIT |
| Brand Name | LYUNIT |
| Colour | White |
| Compressor Type | rotary_scroll |
| Control Method | Remote |
| Controller Type | Touch Control |
| Core Material | Lightweight material |
| Country Of Origin | China |
| Customer Reviews | 4.1 out of 5 stars 1,280 Reviews |
| Efficiency | A |
| Form Factor | Window Seal for Portable Air Conditioners with Retractable Zipper |
| Included Components | Adhesive Tape, Zipper, Cable Ties |
| Installation Type | Window |
| Inverter Type | No Inverter |
| Is Outdoor Unit Required | No |
| Is Product Cordless | No |
| Manufacturer | shenzhenshipenghaoanquanjishushiwuyouxiangongsi |
| Model Name | KTB |
| Model Number | KTB |
| Number Of Circuits | 1 |
| Number of Power Levels | 1 |
| Number of Tubes | 1 |
| Operating Mode | Cooling |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Room Type | Bedroom |
| Seasonal Energy Efficiency Ratio (SEER) | 14 |
| Seasonal energy efficiency ratio (SEER) | 14 |
| Special Features | Waterproof, Easy To Install, Universal, Portable |
| Special feature | Waterproof, Easy To Install, Universal, Portable |
| Start Year | 2022 |
| Start year | 2022 |
| Unit Count | 1.0 count |
| Warranty Type | Limited |
| Window Opening Maximum Height | 300 Centimetres |
| Window Opening Maximum Width | 150 Centimetres |
| Window Opening Minimum Height | 20 Inches |
| Window Opening Minimum Width | 150 Centimetres |
M**L
Easy to put and good zips!
Very pleased with this. Easy to put on and does the job. You can close your window with it on so only remove during g the window. Very good.
J**.
Easy to fit and great seal
Easy to fit, does a great job sealing the window and keeping out the draft.
J**Y
Works Well Once Installed Correctly
This window seal does exactly what it's supposed to do and helps my portable air conditioner work much more efficiently by preventing warm air from coming back into the room. The reason I'm giving it 4 stars instead of 5 is that the installation wasn't as straightforward as I expected. The instructions left me a bit confused, and I struggled to fit it properly on the first attempt. After watching a couple of YouTube videos, I understood how it should be installed and managed to fit it without any problems. Once in place, it created a good seal around the window and AC hose, and the difference in cooling performance was noticeable. Overall, it's a good product and works well, but be prepared to spend a little time figuring out the installation if you've never used one before.
D**T
HIGHLY RECOMMEND
Measured to big, but still does the job at keeping the hot air from blowing back in from the AC highly recommend
M**E
Decent temporary solution.
Was able to fit the product around a standard window, hinge to the left, handle on the right, majority of window opens outwards, with a small portion on the left side which moves in at an angle. I was able to put the velcro up with ease and attach the material to it. The zip is pretty flimsy and has dislodged a couple times leading to the overall zip bunching up in areas. Most of the time, once the AC is on, I can see many gaps start to appear where the adhesive isn't great, but generally it provides enough coverage to work.
B**Y
Poor seal. Unfit for purpose.
If your perimeter is not exactly the size, you will be left with an air gap, also the seal does not travel over corners well, so leaves more air gap. I would say this is designed poorly and is absolutely not going to create a seal. This is expensive also compared to eBay options. I would not recommend you purchase at all.
A**R
It works
Works with hinge windows for vented air con units . Easy to install and comes with plenty of velcro tape to attach to your window. Cheaper and just as effective than the AC unit branded version.
K**O
Very useful for my recently bought AC
Very useful even though it’s a bit too long for my window
S**I
Indispensabili per il condizionatore portatile!
Ho comprato un condizionatore portatile ma senza gli appositi isolamenti termici per l’aria calda che entra da fuori probabilmente il condizionatore non potrebbe mai svolgere appieno il proprio lavoro; pertanto queste tende sono veramente indispensabili. La cosa che mi preoccupava di più era il fatto che non potessero reggere a lungo ma ormai le ho montate da un paio di settimane e posso garantire che invece sono rimaste fisse e non si sono mosse, sono impermeabili che non fa mai male e piuttosto resistenti.Le consigliovivamente.
G**Y
Neem de tijd
Het is van belang het kozijn goed schoon te maken en netjes af te meten, vervolgens goed aandrukken zodat het lijm goed hecht. Het heeft me een uurtje gekost maar hij zit perfect en laat niet los.
A**A
Cumple su función
Funciona bien, es verdad que a veces se despega. Pero funciona bien
C**N
Ne convient absolument pas pour des fenêtres battantes et portes fenêtres à fuir !!!
Ne convient absolument pas pour des fenêtres battantes et portes fenêtres à fuir !!!
E**O
Muy grande
Para nada es muy grande
Trustpilot
3 weeks ago
2 weeks ago