Irfon defines the northern border of the Builth Wells area between Llanwrtyd Wells and Mynydd Epynt . The Irfon defines the northern limit of the Builth Wells area between Llanwrtyd Wells and Mynydd Epynt .
Irfon mentakrifkan sempadan utara kawasan Builth Wells antara Llanwrtyd Wells dan Mynydd Epynt. Irfon mentakrifkan had utara kawasan Builth Wells antara Llanwrtyd Wells dan Mynydd Epynt.