We can help you reduce emissions
Eminox Group of Companies delivers global solutions, from our local European, Indian, North American and UK facilities
Connect with usThe Eminox Group of Companies develops pioneering maritime emissions solutions for many sectors of the marine industry to support naval architects, boat builders and vessel operators understand regulations and remain compliant when operating in inland waterways and ECAs. Working with legislative bodies and partners across sectors including commercial workboat, fishing and inland waterways transportation; for both OEM (Original Equipment Manufacturer) and retrofit solutions we ensure the route to compliance is clear.
Our engineering teams work in collaboration with you to develop your concept all the way through to production. Therefore, providing a flexible, scalable exhaust aftertreatment systems, utilising SaveGuard’s thermal insulation products to optimise safety and efficiency, and which suits your range of marine applications with power outputs, including those with challenging space envelopes.
OEM Tier 1 and Tier 2 solutions
Eminox marine emissions reduction technologies offer marine vessel and stationary power manufacturers and operators’ full compliance to legislative standards, such as, IMO Tier III, EU Stage V Inland Waterways, ULEV and EPA Tier 4 regulations, covering both inland and sea going vessels. Our flexible, modular, and scalable marine exhaust aftertreatment systems for engines with power outputs from 130kW to 5MW, provide you with a solution to reduce lead times, development, approval and costs.
There are two main options in delivering an exhaust aftertreatment system to suit different vessel types. Either select a product from our standard range to suit the engine power output or alternatively, we can develop a solution specific to your project requirements, from concept development to full manufacture. We will carry out engineering evaluation, modelling, prototyping, validation, and verification in our 7,000m2 facility in the UK.
Our research and development into new maritime emissions technologies, understanding more stringent emission control and thermal management to support dual and alternative fuel is hugely significant in supporting the marine sector on its continued journey to maritime decarbonisation.
Stage V
Introduced under EU Regulation 2016/1628, Stage V set strict emissions requirements for engines used in inland waterway vessels, including barges, push boats, workboats and passenger vessels. The EU Stage V emission requirements have been applicable to new inland waterway engines under 300 kW since January 1, 2019, and to engines of 300 kW and above since January 1, 2022. These regulations aim to significantly cut emissions of carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and particulate matter (PM and PN).
Achieving Stage V compliance requires more than simply selecting a compliant engine. In order to comply to these limits, an aftertreatment system is essential. At Eminox, we provide a range of solutions to fit our customer’s needs and to ensure that compliance is met, whether that it is a retrofit or new build application. Our systems integrate technologies such as diesel particulate filters (DPF), diesel oxidation catalyst (DOC) and selective catalytic reduction (SCR) to help meet the required emissions limits while maintaining reliable operation.
Stage V SolutionsIMO Tier III
IMO Tier III refers to the International Maritime Organization’s (IMO) Tier III emission standards for nitrogen oxides (NOx) from marine diesel engines. The standards form part of MARPOL Annex VI, the international framework for controlling air pollution from ships and apply to marine diesel engines above 130kW operating in designated NOx Emission Control Areas (NECAs).
Tier III requirements represent a significant reduction in NOx emissions, requiring approximately 80% lower emissions than the previous Tier I standards. The requirements first came into effect in 2016 for ships operating in the North American and United States Caribbean Sea ECAs, before extending to the Baltic Sea and North Sea ECAs in 2021.
With regulations tightening and exemptions becoming more limited, compliance can no longer be postponed. Vessel owners, OEMs and builders need exhaust aftertreatment systems capable of delivering high levels of NOx reduction across real-world marine operating conditions. To address these challenges, Eminox Group provides a single-source, globally supported approach to exhaust aftertreatment, helping customers achieve reliable emissions compliance.
IMO Tier III SolutionsUpgrading Vessels
Eminox retrofit solutions can upgrade your existing vessels to ensure they comply with IMO Tier III, Stage V Inland Waterways or EPA emissions legislation. Our proven DPF and SCR technologies, utilising SaveGuard substrate support mat, can be installed into existing applications to achieve near zero emissions of particulate matter (PM), nitrogen oxides (NOx, NO2) carbon monoxide (CO) and hydrocarbons (HC) to support maritime decarbonisation initiatives.
Incorporating the Eminox control unit and all sensors throughout the system, our diesel particulate filter (DPF) unit monitors exhaust flow under different operating conditions to maximise service interval time. Our innovative urea dosing and control system (UDS) is designed to minimise the package space required in your application, whilst the advanced mixing techniques guarantees a compact system.
The installation of the diesel oxidation catalyst (DOC) and DPF together with high performance Selective Catalytic Reduction (SCR technology) and pipe work are commissioned and certified for your application, providing a complete optimised solution.
Scheme B Approval GuideNews and Features
2 September 2026
Certification Of Imo Tier Iii Exhaust Aftertreatment System For Rolls-royce Series 2000 Mtu Engines
We are pleased to announce that the Eminox Group has developed an IMO Tier III exhaust aftertreatment system for Rolls-Royce mtu marine propulsion systems. The integrated selective catalytic reduction (SCR) technology will be applied to the company’s Series 2000 mtu engines. Selective Catalytic Reduction (SCR) is the most technically mature and certifiable route to IMO […]
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28 July 2026
Meeting Imo Tier Iii Compliance: What Vessel Operators And Builders Need To Know
Regulatory tolerance for non-compliance with IMO Tier III NOx limits is narrowing. For vessels above 130kW operating within Emission Control Areas (ECA), covering the North Sea, Baltic, North American coastal waters and beyond, achieving up to 80% NOx reduction against IMO Tier I baselines is now an operational reality, not a future consideration. The question […]
Read more… about “Meeting IMO Tier III Compliance: What vessel operators and builders need to know”
17 July 2026
Emission Control By Eminox And Halyard (m&i) Sign Letter Of Intent To Collaborate On Marine Emissions Solutions
We are excited to announce that we have signed a Letter of Intent for a collaboration with Halyard (M&I), to work together in support of projects requiring SCR and DPF aftertreatment technologies. Together, we will support projects requiring advanced emissions control systems, helping vessels comply with increasingly tight regulations, including IMO Tier III and Stage […]
Read more… about “Emission Control by Eminox and Halyard (M&I) Sign Letter of Intent to Collaborate on Marine Emissions Solutions”
