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We are closed for the winter. Place your order now to be the first in line when we reopen production in April 2027.
We are closed for the winter. Place your order now to be the first in line when we reopen production in April 2027.

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Martinson Manufacturing designs and produces precision window inserts for portable air conditioners. Built for non-standard windows, each insert is made to exact dimensions and engineered to fit cleanly, install easily, and perform reliably in real homes.

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Our Promise

Every insert we build is
designed to fit your window exactly, install cleanly, and work the way it should. If it doesn’t fit right, we’ll remake it. No workarounds, no damage, no guesswork, just a solution that performs reliably in your home. Every time.

Contact

Martinson Manufacturing
705 Schoenhaar Dr #101
West Bend, WI 53090
info@martinsonmanufacturinm.com
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