For example when watching 1080p youtube video in Safari the power consumption is only 0.1watt because it’s using hardware decoders. (not including display backlight, I can’t measure it). But when I play the same video in firefox which is using software decoding the consumption is around 0.7w which is not as good as hw decoders, but still less than a watt
Hydrogen Sulfide can damage concrete, not sure about the chair tho