Question

how does exhaust fan pushes hot air outside the room?​

Answer 1

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A whole-house fan uses one-tenth as much power as AC. It draws cooler outside air in through open doors and windows to create a pleasant breeze that pushes hot air out through attic vents. 

Answer 2

Answer:

ʜɪ ᴍᴀᴛᴇ,

ᴡʜᴇɴ ғᴀʟʟ ʀᴇᴠᴏʟᴠᴇs ᴀʀᴏᴜɴᴅ ᴛʜᴇ ᴀxɪs, ɪᴛ ʀᴇᴠᴏʟᴠᴇs ғᴀsᴛʟʏ ᴀɴᴅ ɢɪᴠᴇs ᴄᴏᴏʟ ᴀɪʀ ʀᴀᴛʜᴇʀ ᴛʜᴀɴ ʜᴏᴛ ᴀɪʀ. ʙᴇᴄᴀᴜsᴇ ᴏғ ɪᴛ's sᴘᴇᴇᴅ ᴀɴᴅ ғᴀsᴛ ʀᴇᴠᴏʟᴠɪɴɢ, ᴛʜᴇ ʜᴏᴛ ᴀɪʀ ɪs ᴘᴜsʜᴇᴅ ᴏᴜᴛ ᴏғ ᴛʜᴇ ʀᴏᴏᴍ ɪɴ sᴜᴄʜ ᴀ ᴡᴀʏ ᴛʜᴀᴛ ᴛʜᴇ ᴄᴏᴏʟ ᴀɪʀ ɪs ᴘʀᴏᴅᴜᴄᴇᴅ.

ᴘʟᴇᴀsᴇ ᴍᴀʀᴋ ᴍᴇ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ.