The altar recharges Prayer points, as all other altars do. Altars in a POH also allow players to offer bones upon them, providing bonus Prayer experience over simply burying the bones; the maximum bonus of 250% (i.e., total experience is 350% of the base amount) is given by a Gilded altar with two burners lit.
Torches and candlesticks are strictly decorative. Incense burners are lit individually. Each lit burner boosts prayer experience by 50% on top of the altar's experience bonus when offering bones. All three kinds of incense burners give the same prayer bonus. To light the burners, players need a clean marrentill for each burner.
The chapel aligns to either Guthix, Saradomin, Zamorak, or Bob depending on the icon chosen. The default alignment is to Saradomin.
The icon you use affects the way some of the furniture looks in your chapel. For example, if you have a Guthix icon, the windows will have the Guthix symbol on them. If you have a Zamorak icon, the two statues will be of Zamorak, along with the symbol on your altar.