Wärtsilä has long been at the forefront of sustainable technology development. Just as cleaning wastewater or reducing air emissions are important contributors to a cleaner environment, engine efficiency is also central to sustainability. With years of experience in exhaust gas cleaning for marine applications, Wärtsilä has developed efficient, safe, and certified products for eliminating air emissions.

Our extensive reference list is evidence of our know-how and expertise in this field. With different size options, a minimized footprint, retrofit packages, and environmentally sound options, we are certain that we can find the right solution for any vessel. Our dedicated EGC team will assist you every step of the way; from initial planning to post-installation service agreements.



NOx Reduction

    Wärtsilä NOR

    Selective Catalytic Reduction, or SCR, is one of the few technologies capable of reducing Nitrogen Oxides down to the levels required by today’s most stringent regulations, and since year 1990 Wärtsilä has delivered hundreds of SCR systems. The Wärtsilä NOx Reducer (NOR) has been developed to enable vessels to comply with the IMO’s Tier III emission levels, while still maintaining a compact design optimised for marine applications. It is also available for land based installations and other NOx levels.


    The NOR is compatible with the entire portfolio of Wärtsilä 4-stroke engines. The technology has been developed and tested with Wärtsilä engines to ensure safe and flexible operation, and features an integrated communication system.  The product also works very well in combination with the Wärtsilä compact silencer and any of Wärtsilä’s scrubbing systems. Together, this forms a complete package comprising efficient energy production, silencing, and a full emissions reduction system. In addition to marine newbuild installations, the Wärtsilä NOx Reducer is used for retrofit installations and land based power plant applications.

    Tier III NOx standards

    The IMO’s Tier III regulations typically require SCR systems to be used with diesel operated engines. A marine diesel engine installed on a ship constructed on or after 1 January 2016, and operating in the North American ECA and the United States Caribbean Sea ECA, must comply with the Tier III NOx standards. Also starting from 1 January 2021 countries bordering Baltic Sea, North Sea and English Channel will form a NOx Emission Control Area. Earlier these countries have formed a SOx ECA since 2015. You can read more about the IMO rules at  www.imo.org.

    Local regulations

    There are other strong drivers for compliance, such as the US EPA rules for diesel boats and ships (https://www3.epa.gov/otaq/marine.htm), the Norwegian NOx tax, several inland waterway rules, and local discounts in port and fairway fees.


    Download Product Guide

    Wärtsilä exhaust gas cleaning technology is an economical and environmentally friendly solution for tackling all new and existing rules and regulations and are designed to provide flexibility and reliable operations wherever you operate.

    Download the brochure

    SOx Reduction 

    The reduction of sulphur oxide (SOx) emissions from marine vessels has been a priority for some time now, due to the harmful impact they have on both human health and the environment. Rules have been introduced stipulating both global limits and specified Emission Control Areas (ECA) limits. Wärtsilä has developed a full wet scrubber portfolio to fit our customer needs.  All Wärtsilä scrubbers have been tested and certified according to the IMO guidelines, thus ensuring safe operation and compliance with MARPOL Annex VI , Regulation 4.  Wärtsilä strives continuously for technological excellence, and to minimize the environmental impact of our scrubber systems.  This is why our scrubber systems not only reduce SOx, but also remove large levels of particulate matter (PM) and black carbon. Each system has water treatment units installed to clean the scrubbing water before discharge. Wärtsilä has made it easy for customers to get exactly what they want, and our packages range from equipment only to full turnkey installations.

    Download Product Guide

    Wärtsilä exhaust gas cleaning technology is an economical and environmentally friendly solution for tackling all new and existing rules and regulations and are designed to provide flexibility and reliable operations wherever you operate.

    Read more about SOx scrubber technology
    «Are you ready for 2020»?

    2020 0.5% Sulphur Cap

    The year 2020 will mean a turning point for the marine industry, and also for worldwide shipping operations. The IMO has decided to introduce the global 0,5% sulphur cap in 2020, as planned. This means that all companies, independent of operation area, should start thinking about fuel and abatement options. Wärtsilä has extensive experience in marine market applications and with SOx scrubbing systems. We have the technology, the capacity, and the network to meet the challenge of a global sulphur cap. With a full wet scrubber portfolio, we can supply flexible and customized solutions for our customers, be it a single installation or for an entire fleet.

    Ask us about our Exhaust Gas Scrubber Solution for 2020. Customized for meeting 0.5% with possible savings in space, energy consumption and cost.

    Q&A with Sigurd Jenssen, Director, Exhaust Gas Cleaning
    How the 0,5% global sulphur cap will affect the shipping industry, and getting ready for 2020

    Experience Counts

    Wärtsilä has more than 704 scrubbers delivered or on order for more than 535 vessels

    System Type
    Scrubber Type
    Vessel Type
    Statistics Reported: March 21st 2019


    Our Retrofit Services

    Wärtsilä Retrofit Services supports its customers throughout the lifecycle of a retrofit project by providing excellent engineering capabilities, by minimizing risks, keeping downtime to a minimum, and through reduced customer project management costs. As a professional project organization, we are capable of managing retrofit projects of all kinds wherever you are in the world, including EPC (Engineering Procurement and Construction), class and statutory approvals, commissioning, and crew training. Wärtsilä develops tailored retrofit solutions in close cooperation with the customer - from the very first enquiry until the system is successfully delivered and the project complete. By working very closely with the customer, we can establish the precise needs, and then validate the solutions at the conclusion of each phase of the project. After the project is completed, Wärtsilä’s global services network is there to support customers throughout the lifecycle of the ship.

    Read more about our retrofit services


    The world of Wartsila Scrubbers

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    Smart SOx compliance 2020

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    Exhaust gas cleaning systems are here...

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    Trailblazers in exhaust gas cleaning...

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    Clean and clear

    Whether spurred by tightening regulations, customer demand or enlightened corporate policy, today’s shipowners...
    23 January 2017
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    Contact Us

    EGC Scrubber Sales Team

    Heidi Paulsrud

    Heidi Paulsrud
    Director, Sales & Marketing 

    Marit Karstensen

    Marit Karstensen
    Sales & Marketing Coordinator

    Ole-Johan Øby Svendsen

    Ole-Johan Øby Svendsen
    Sales Manager – Korea, North Europe

    Christian Lobsgaard

    Christian Lobsgaard
    Sales Manager – Americas

    Kashif Javaid

    Kashif Javaid
    Sales Manager – Japan, Middle East, Southern Asia

    Heidi Paulsrud

    Håvard Langdalen
    Sales Engineer with area responsibility for – Taiwan, Southern Asia, Australia, New Zealand

    Heidi Paulsrud

    Ren Li
    Sales Engineer with area responsibility for – China

    Catalyst Team

    Jussi Uusipaavalniemi

    Jussi Uusipaavalniemi
    General Manager, Sales

    Jussi-Petteri Soikkeli

    Jussi-Petteri Soikkeli
    Sales Manager


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