The CO2 Stunning System segmentation by type comprises three primary configurations: CO2 gas‑based, CO2 liquid‑based, and hybrid CO2 systems. CO2 gas‑based units dominate the market, accounting for roughly 55 % of total revenue, because they offer rapid diffusion, lower equipment cost, and compatibility with existing slaughter‑house infrastructure. CO2 liquid‑based systems, representing about 30 % of the market, are favored in high‑throughput operations where precise dosing and reduced gas consumption are critical; their higher capital outlay is offset by lower operating expenses over time. Hybrid systems, which integrate gas and liquid delivery mechanisms to optimize stunning efficacy across species, capture the remaining 15 % and are gaining traction in niche segments that demand flexible performance parameters. Each type contributes proportionally to the overall market size, reflecting the trade‑off between capital intensity, operational efficiency, and regulatory compliance that operators evaluate when selecting a CO2 stunning solution.