The Type dimension of Marine Scrubber segmentation distinguishes three core architectures: open‑loop, closed‑loop, and hybrid systems. Open‑loop scrubbers discharge treated wash water overboard, leveraging seawater as the scrubbing medium; they dominate the market due to lower capital outlay and simpler integration, accounting for roughly 55 % of total installations. Closed‑loop units retain wash water in an onboard storage tank, treating it with a recirculating chemical solution; this configuration commands about 30 % of the market, driven by stringent emission‑control area (ECA) regulations that prohibit direct discharge. Hybrid scrubbers combine the two approaches, switching modes based on operational geography; they represent the remaining 15 % and are gaining traction where vessels alternate between ECAs and open ocean. Each type contributes uniquely to the overall market size by aligning capital cost, regulatory compliance, and operational flexibility, thereby shaping procurement strategies across shipowners and influencing the aggregate demand for scrubber components and services.