I assume by “thermal infrared” you mean the IR produced by approximately room te... | Hacker News

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		elil17 on Jan 17, 2023 \| parent \| context \| favorite \| on: Heat pumps of the 1800s are becoming the technolog... I assume by “thermal infrared” you mean the IR produced by approximately room temperature objects. Incandescent bulbs produce much higher energy infrared because the filament reaches about 2000 Celsius. Those higher energy waves can go through glass.

Dylan16807 on Jan 17, 2023 [–]

Right, that's true, I was thinking about it wrong.

Still, not much is going to hit a window on average. So maybe 90% efficient.

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