Need Help Install Window Air Conditioner in Storm Window Frame

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.

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

Unless the metal is real thick, don't be suprised if the window starts 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...

Good suggestion, I'll get a piece of wood.

Mike