Which type of concrete masonry unit (CMU) has more space for placing conduit or other utilities?

The type of concrete masonry unit (CMU) that provides more space for placing conduit or other utilities is the four core block. This unit is designed with four hollow cores, which creates ample space within the block for the installation of electrical conduits, plumbing, or other utilities. The additional cores allow for greater flexibility in running systems through the walls, making it advantageous in construction scenarios where utility placement is needed.

In contrast, solid blocks are not hollow, thus offering no utility space, while two core blocks provide limited conduits compared to four core blocks. Split face blocks, primarily used for aesthetic purposes, also do not offer the same utility space due to their design. Therefore, opting for a four core block is a practical choice when utility placement is a priority.