There's no such thing as whole house air conditioning here. Running air conditioning in the living room during the day isn't going to do anything for the bedroo

There's no such thing as whole house air conditioning here. Running air conditioning in the living room during the day isn't going to do anything for the bedroom at night. Also houses are often empty during much of the day due to people being at work/school. So they get home at 6pm and turn on the air conditioning. They certainly wouldn't leave it running all day when no one is home.