this post was submitted on 24 Apr 2026
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I recently got a small university apartment but it has no AC and I'm told it gets hot during summer. There are some large floor-to-ceiling windows where heat can come in and I can't place anything outside like an awning.

What are the best coverings to use to reduce heat? Is there a way that doesn't completely darken the room?

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my understanding is that the windows themselves control what heat enters, so unless you can put something out the outside (like a somewhat reflective film), you're more or less limited to white colored curtains to bounce more light back out.

letting light in but stopping heat at the pane is generally something done at the window manufacturing level with [low emissivity] glazings.