Commercial vessels: Exhaust Aftertreatment systems for main enignes and generators

Safeguard your investment and stay compliant

Get the most reliable exhaust upgrade for your main engines and generators

Certified systems allow to operate your vessel even in restricted areas without the need to replace or upgrade the engines.

Quick installation, easy maintenance, on-board cleaning and excellent parts availability ensure cost efficient operations.

Make sure crew, staff, and visitors on board and on land are protected from pollution.

We should talk!

HJS has the certified solution to protect your investment by keeping your vessel compliant with the latest emissions regulations and your crew safe.

Protect your crew, staff, and visitors on board and around the vessel from harmful pollution.
Stay compliant by fulfilling the latest legal requirements regarding exhaust emissions.
Protect the value of your vessel and make sure it can operate even in certain restricted areas.

We care about your crew, your investment, and your compliance

More than 45 years in the emission reduction business.
Installation and maintenance teams in the USA and Europe and all over the world.
Tens of thousands of systems installed in many countries all over the world with thousands of satisfied customers.
Removed thousands of tons of diesel exhaust particles (PM 2.5).
Based on the patented technology by HJS, Daimler and Johnson Matthey setting new benchmarks on emission standards.
The HJS system maintains consistent exhaust gas temperatures to provide regeneration throughout a wide range of loads.

HJS offers the flexibility of custom-made products combined with the highest quality based on decades of manufacturing experience

Unlike most other systems offered in the marine industry, the HJS system is based on decades of experience in all kinds of aftertreatment applications around the world.
Most competitors are buying components from several suppliers and put them together. HJS has an experienced R&D team with decades of experience in all relevant areas of aftertreatment systems and it operates its own manufacturing facility which produces thousands of filter substrates, components, and complete systems every year.

With three easy steps your vessel will be safe, compliant and ready for the future:

On-site visit with one of our experts to layout the perfect HJS system for your demands.

Get it installed and have a clean, compliant, and safe vessel – ready for future endeavors.