Albert Barnes Commentary Ezekiel 42:13

"Then said he unto me, The north chambers and the south chambers, which are before the separate place, they are the holy chambers, where the priests that are near unto Jehovah shall eat the most holy things: there shall they lay the most holy things, and the meal-offering, and the sin-offering, and the trespass-offering; for the place is holy." — Ezekiel 42:13 (ASV)

In (Leviticus 10:13) it was prescribed that the priests should eat of the sacrifices in the holy place. This was originally before the altar in the inner court; now, separate chambers are assigned, and these become the holy place for this purpose. Of the trespass-offering and meat-offering what was not consumed was eaten (Leviticus 7:6), but the sin-offering was burned without the camp (Ezekiel 43:21). Probably the carcass was brought from the altar to the chamber before being carried out.