Custom Portable AC Window Kit for Casement Windows

High quality product with outstanding customer service. Everyone was so helpful and polite, even when the product did not fit due to my error it was replaced for free. I would recommend this product and company to anyone who would listen.

I love my window insert for my portable air conditioner! It came quickly in the mail, was packed super securely, and popped right into my window! I highly recommend Martinson Manufacturing for these types of window inserts, which save a ton of hassle when installing portable AC units. Thanks so much!

Perfect fit , perfect solution . An air-conditioning problem in one room that would’ve cost me $11,000 any other way that I sliced it ended up costing me 350+ a standup air conditioner and the room is perfect now extremely quick shipping extremely quick turnaround and fantastic product.