Question

why ac kept on top and heater kept at ground​

Answer 1

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1. Cold air being heavier settle down
2. Hot air being lighter arises up

So if AC would be near ground then it would not possible to cool whole room as cold air will only surround it

So if heaters would be near the celling then the hot air would surround near it and would not be possible to warm whole room

$<marquee >Hope it is helpful$

$<marquee>Mark as the brainlist ans with thanks..$