Yeah I mean you’d have to consider the practical factors such as how quickly or evenly they can heat up a room rather than worry so much about the raw efficiency.
The sound will eventually dissipate in the air as heat. The light will be absorbed into surfaces, like any other radiation, as heat. Still 100%, but with a couple extra stops along the way.
CookieOfFortune@lemmy.world 8 months ago
kakes@sh.itjust.works 8 months ago
All energy output will eventually become heat. Why bother measuring efficiency at all if we’re counting those aftereffects?
pixxelkick@lemmy.world 8 months ago
Only heaters are a machine where the “good” output is one you want to be heat.
For other devices the heat is the bad part.
But since your goal with a heater… is to generate heat… and all energy eventually will become heat, it is close to 100% efficient.
If you can hear the heater’s sound it makes in a room/area you don’t want to be heating though, now it’s <100% efficient as a tiny bit of energy became heat that heated the non ideal location.
kakes@sh.itjust.works 8 months ago
Fun fact: this phenomenon is what causes the infamous “hot ear” effect that many people suffer from every day.