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  1. 135gmc

    S-457 shelter help needed

    My shelter never had an AC, but I'm adding one. I'm trying to figure which location will work better - on the back side by the door hinges, or in the side like your shelter. In either case, I have to cut a hole through the side and build the mounting hardware. The end mount doesn't take any...
  2. 135gmc

    S-457 shelter help needed

    I found a page that shows the AC installation -
  3. 135gmc

    S-457 shelter help needed

    The S-457 was used for the AN/TRR-33 telephone & radio monitoring station. It had an air conditioner installed through the curb side - the AC was usually a 6000 BUT AC with a built in electric heater. Most of the ACs were built by three suppliers, but they were all identical. Hollingsworth built...
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