Need Help Install Window Air Conditioner in Storm Window Frame

Hi, I just installed my first window air conditioner, GE AMG0LJ. The window frame is metal and the AC installation kit is for a wood window frame. does anybody sell AC installation kits for metal window frames .
BTW, the GE AMG0LJ 6,000BTU is very quite and high efficiency
Thanks,
Mike
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How about some clarification. In the subject line, you say "Storm Window Frame" but now you say it is a metal window.
Where I live the storm window sits outside the regular double hung window. Sometimes the bottom of the storm frame is higher than the sill inside. You just cut a piece of wood the proper thickness to raise it up equal or slightly above the storm frame. Cut the wood to length and lay it between the two windows. Use a 1 x 3 or a 2 x 4 or whatever you need.
If you are talking metal frame inside windows, different story. If it is a typical double hung, you drill a hole in the frame and use a sheet metal screw to hold in on top of the AC expander frame.
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It's a metal window frame. There's a high spash guard so I don't need to build it up using wood. I'll use sheet metal screws and sheet metal.
Mike
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buzzing like mad when the AC kicks on. Metal on metal is often real noisy. Personally, if there was a painless way to lay a board in there to be the weight-bearing surface for the AC unit, I would do it. Think of it as a vibration damper.
aem sends...
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Good suggestion, I'll get a piece of wood.
Mike

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