• Scenery showing the sea and a coast with cliffs and green grass
  • Sea view with blue sky and clouds

„For a cleaner future we are focusing
on environmental protective solutions for the
maritime and stationary industry.“

Expert for NOx reduction for all applications

Your partner in SCR,
catalyst and NOx treatment technology

Whether cogeneration power plants, industrial incineration, marine propulsion systems or greenhouses are involved: We accompany you starting with the initial idea, comprising successful realization and guaranteeing the continuous support of your projects.

H+H SCR Technology for lower NOx emissions
H+H SCR Technology for lower NOx emissions
  • Marine SCR Systems

    NOx Reduction by SCR Catalyst on Ships

    Marine SCR Systems

    With almost 30 years of experience we serve more than 300 ships in service with more than 800 engines.

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    A large ship, which is serviced by H+H Engineerings Service, is moored in the harbor.
  • Industry

    Your effcient partner for industrial applications


    Stationary combustion engines are subject to strict legal guidelines, demanding the implementation of efficient measures to reduce emissions, while maintaining the best possible levels of performance.

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    A large industrial facility that benefits from emissions reduction.
  • CO2 - fertilization

    Maximize crop and plant growth

    CO2 – fertilization

    The H+H fertico2 System cleans the exhaust gas from your engine, so it can be used to fertilize your plants.

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    An industrial greenhouse being enriched with CO2.
  • Service

    Personal and reliable


    Our personal support and service does not end with the sale of a SCR system. Our competent and reliable service engineers will always take care of your needs.

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    Detail of sustainable globe with clear blue water, healthy green land and blue sky.

Perfect planning from the very beginning

H+H – Consulting & Planning

For perfect results, we focus on excellent planning.

For us, customer satisfaction begins with consultation and with detailed planning,
that takes your requirements into account from the very beginning. This is how we create innovations and solutions that are perfectly
customized to your needs and guarantee reliability for our customers.

This is ensured by competent employees who support you throughout the entire
project phase and combine extensive know-how with the best advice.

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Your career at H+H

It is a pleasing circumstance, but it also
brings challenges: H+H is growing!

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Ein Gruppenbild der Belegschaft von H+H Engineering