Custom Portable AC Sliding Window Vent Kit for Windows & Doors

Love it. I've always been frustrated by the flimsy bits of board that ship with portable Air Conditioners. They break easily, they block light. They look ugly. I stumbled upon this solution and its absolutely incredible. Its very well made. Its sturdy. It looks almost like magic to see your vent hose 'floating' in space. Incredible product.

Love, love, love this window insert! Having used the kits that come with the ac units which are a nightmare, the window insert from Martinson Manufacturing is a dream! If you use a portable ac unit, we highly recommend you get one of these window inserts. You will not regret it!

I bought a second Midea air conditioner for a second bedroom, so this is the second insert that I bought from Martinson (the first one was perfect). This window insert is faster and easier to install than the metal one that ships with Midea. Also, it looks far better. Midea's is metal with sliders. It leaves you with air gaps that you must fill with silicon or tape. Martison's fits perfectly.