Put it on the north side - He seems to have intended to conform every thing in the Lord's house as much as possible to the idolatrous temples which he saw at Damascus, and to model the Divine worship in the same way: in a word to honor and worship the gods of Syria, and not the God of heaven. All the alterations specified here were in contempt of the true God. Thus he provoked to anger the Lord God of his fathers, 2 Chronicles 28:25.
Hereto the “Brasen altar” (marginal reference) had, it would seem, occupied a position directly in front of the temple porch, which it exactly equalled in width. Now Ahaz removed it from this place, and gave the honorable position to his new altar, which he designed to supersede the old far all ordinary purposes 2 Kings 16:15.
From between the altar - Urijah, having received no official directions, had placed the new altar in front of the old, between it and the eastern gate of the court. Ahaz consequently on his arrival found the brasen altar “between the (new) altar and the house of the Lord.”