Application‑level Waste Heat Recovery Boiler segmentation allocates the market across six end‑use categories: power generation, process heating, district heating, refineries, chemical production, and food & beverage. Power‑generation facilities capture turbine‑exhaust or boiler‑flue heat to improve overall plant efficiency, driving the largest share (≈35 %) of the market due to the high volume of waste heat and the premium placed on incremental megawatt output. Process‑heating applications, encompassing metal‑working, pulp‑and‑paper, and glass‑making, command about 30 % as they require reliable, high‑temperature steam or hot water for continuous operations. District‑heating schemes, which redistribute recovered heat to residential or commercial networks, hold 15 % of the market, reflecting growing urban sustainability initiatives. Refineries and chemical plants together account for 15 % (10 % and 5 % respectively), where waste heat from cracking units and reactors is repurposed for steam generation. The food‑and‑beverage sector, though smaller (5 %), benefits from low‑temperature waste streams for sanitation and pasteurization. This application breakdown underpins strategic investment decisions across the Waste Heat Recovery Boiler market.