Water heaters come, broadly, in two varieties: with and without tanks.

Tankless water heaters can be mounted on exterior walls, in closets, or in mechanical rooms. These types of water heaters are easily identified by their connections, their intake and exhaust piping, and their lack of a large cylinder (the tank).

These tankless water heaters have their own EUL, effective age, and RUL; we place them regularly on the Modified Capital Reserve Table.