My understanding is you only need to rise in hot (read: boiling) water if the tea has inclusions that are not tea such as fruit or is a fermented tea such as Pu'erh. This is not the case for sun tea which encourages bacteria growth.
My understanding is you only need to rise in hot (read: boiling) water if the tea has inclusions that are not tea such as fruit or is a fermented tea such as Pu'erh. This is not the case for sun tea which encourages bacteria growth.