H+H Engineering & Service
H+H Engineering & Service GmbH is a German family-owned SCR specialist that designs, manufactures, and services custom Selective Catalytic Reduction systems for marine vessels, stationary industrial combustion engines, and greenhouse CO2 fertilization, serving enterprise customers worldwide via direct field sales and a 16-country service partner network.
- Company typePrivate
- Founded2007
- HeadquartersSonnefeld, Germany
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What H+H Engineering & Service does
H+H Engineering & Service GmbH is a privately held, family-owned German engineering firm founded in 2007 in Sonnefeld, Bavaria, that designs, manufactures, and services Selective Catalytic Reduction (SCR) systems for NOx reduction. Its core products are homogeneous extruded honeycomb SCR catalysts (composed of titanium oxide, tungsten oxide, and vanadium pentoxide with fiberglass reinforcement), oxidation catalysts, precision urea injection systems, and proprietary control software — with each system custom-engineered rather than catalog-sold. The company serves three primary verticals: marine (300+ ships and 800+ engines in service, addressing IMO Tier III, US EPA Tier 4, and EU Stage V compliance), industrial stationary (gas turbines, CHP units, glass furnaces, biomass boilers addressing 44. BImSchV and EU MCP 2015/2193), and greenhouse agriculture through its fertico2 system that converts engine exhaust into clean CO2 for plant fertilization.
H+H's technology stack combines proprietary catalyst chemistry, in-house CFD simulation using COMSOL Multiphysics, Siemens-based PLC programming, and the CaReCon remote-monitoring software platform, with design and manufacturing fully based in Germany. Revenue is generated through one-time capital-equipment sales of complete SCR systems plus a recurring revenue tail from service and maintenance contracts, spare parts (warehoused in Germany, Norway, USA, and the Netherlands), catalyst management, operator training, and remote-maintenance subscriptions. The go-to-market is enterprise field-sales: dedicated contact persons accompany customers from consulting and detailed planning through engineering, commissioning, and lifetime service, supported by a network of 16+ country-level service partners spanning Europe, Asia, and the Americas.
The firm holds DIN ISO 9001:2015 certification, is a member of VDMA, and is led by Managing Directors Dr. Thomas Ritter (Stationary Sales and R&D) and founder Jürgen Müller (Marine, fertico2, and Service). With 18 employees, 750-1,000+ SCR systems commissioned over 30+ years of accumulated domain experience, and a stated 'growing' trajectory, H+H positions itself as a niche, engineering-led specialist in a regulatory tailwind market where compliance-driven demand for emissions reduction continues to expand.
H+H Engineering & Service firmographics
Firmographics- Name
- H+H Engineering & Service
- Legal name
- H+H Engineering & Service GmbH
- Website
- https://huhes.de
- Company type
- Private
- Founded year
- 2007
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- H+H Engineering & Service GmbH is a German family-owned SCR specialist that designs, manufactures, and services custom Selective Catalytic Reduction systems for marine vessels, stationary industrial combustion engines, and greenhouse CO2 fertilization, serving enterprise customers worldwide via direct field sales and a 16-country service partner network.
- Ownership category
- akta.pro rank
H+H Engineering & Service industry classification
Industry- Product category
- Emissions Control Equipment
- NAICS
- Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)
- SIC
- Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)
- akta.pro primary industry
- Emissions Controls & Environmental Retrofit Services (SCR/FGD/ESP, CEMS) (EUAEALAL)
- akta.pro secondary industries
- Environmental & Emissions Control Catalysts (DeNOx/DeSOx/DOC/CO Oxidation) (IMAEAIAC), Emission Control & Scrubbing Equipment (Scrubbers, Dust Collectors, Catalytic Systems) (IMAHAEAK)
Keywords
Where H+H Engineering & Service is headquartered
LocationHeadquarters
- HQ city
- Sonnefeld
- HQ country
- Germany
- HQ region
- Europe
Offices1 record
Markets served
H+H Engineering & Service business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Supply Chain, Infrastructure
Revenue model
- SCR System Equipment Sales: Sale of complete SCR systems including catalysts, urea injection systems, control units, and optional components. Custom-engineered solutions tailored to specific applications with pricing based on project scope and complexity.
- Service and Maintenance Contracts: Ongoing service contracts including annual maintenance, calibration of emission measurement systems (NOx analyzers), catalyst management, and optimization services. Company emphasizes personal support with dedicated contact persons.
- Spare Parts Supply: Supply of spare parts and consumables with warehouses in Germany, Norway, USA, and Netherlands ensuring high availability. Includes catalyst replacement and wear parts.
- Remote Maintenance and Reporting: Remote maintenance services using Ewon remote access technology, troubleshooting support, and data logging for detailed NOx reduction reporting.
- Operator Training: Operating and maintenance training tailored to customer SCR plants, conducted on-site or at H+H facilities.
- Catalyst Management Services: Laboratory analysis of catalyst samples to determine wear levels and remaining lifetime for budget planning purposes.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom project-based pricing for SCR systems |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels6 records
H+H Engineering & Service product offering
Product offeringCore offering
H+H Engineering & Service GmbH designs, engineers, manufactures and services Selective Catalytic Reduction (SCR) systems for exhaust gas cleaning across marine, stationary industrial, and greenhouse applications. The company delivers complete, custom-engineered SCR installations including catalysts, urea injection systems, PLC-based controls and proprietary CaReCon remote monitoring software, and also operates a fertico2 system for CO2 enrichment in greenhouses.
Product overview
H+H Engineering & Service GmbH is a complete solutions provider of DeNOx and SCR (Selective Catalytic Reduction) systems for exhaust gas cleaning. The company offers three integrated product lines: Marine SCR Systems for ship propulsion (300+ ships served), Stationary SCR (DeNOx) Systems for industrial and combustion engine applications, and the fertico2 CO2 Fertilization System for greenhouse applications. These core products are supported by proprietary software including CaReCon for remote control, and innovative features like Cyclic Cleaning, ICP Software, and Clean Design for optimization. Key components include SCR Catalysts (extruded honeycomb type) and Oxidation Catalysts, all manufactured in Germany. The company also provides CFD analysis services for system simulation and comprehensive service offerings including catalyst management, operator training, and maintenance.
Differentiator
Problem solved
Functional benefit
Brands
- fertico2: CO2 fertilization system for greenhouses that cleans exhaust gas from engines for use in plant growth
Products and services
- Marine SCR Systems
Quantifiable outcome
- NOx reduction rates exceeding 90%
- +6 more outcomes
Companies that use H+H Engineering & Service
Customer profileNamed customers14 records
Segments4 records
Ideal customer profiles4 records
H+H Engineering & Service technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature7 records
H+H Engineering & Service partnerships and signals
Strategic signalPartnerships
18 partnerships are on record, tiered core and minor.
- DCL Europe GmbHcoreDCL Europe GmbH based in Sulzbach am Taunus, Germany serves as partner for oxidation catalysts and covers France, Italy, France/Italy regions. Also provides service support for France, UK, Belgium, and Luxembourg.
- AeriNOx Inc.coreAeriNOx Inc. based in Eaton, Colorado, USA represents H+H in North American market for gas turbine SCR systems, including cooperation on projects like Danville Compressor Station.
- DCL International Inc.coreDCL International Inc. based in Concord, Ontario, Canada serves as H+H partner for North American market covering Canada.
- ReduNOx B.V.coreReduNOx B.V. based in Aalsmeer, Netherlands provides service and representation in Dutch market, including installations at Dekker and Bunnik facilities.
- Envi Energy Co., Ltd.coreEnvi Energy Co., Ltd. based in Seoul, Korea provides representation and service support in South Korean market.
- Praezision Technik China Ltd.corePraezision Technik China Ltd. based in Beijing, China provides representation and service support in Chinese market.
- Nielsen Marine APScoreNielsen Marine APS based in Hjørring, Denmark provides marine SCR service and representation in Danish market.
- Hafvik Solutions AScoreHafvik Solutions AS based in Rælingen, Norway provides marine SCR service and representation in Norwegian market.
- SEA Power LimitedcoreSEA Power Limited based in Glyfada, Greece provides marine SCR service and representation in Greek market.
- NAVALCOcoreNAVALCO based in Arteixo, Spain provides marine SCR service and representation in Spanish market.
- Trivision Technology TaiwancoreTrivision Technology Taiwan based in Taipei, Taiwan provides representation and service support in Taiwanese market.
- V-Mark Aviation CocoreV-Mark Aviation Co based in Hong Kong provides representation and service support in Hong Kong market.
- BettercoreBetter based in Santiago, Chile provides representation and service support in Chilean market.
- ORGREZ, a.s.coreORGREZ, a.s. based in Brno, Czech Republic provides representation and service support in Czech market.
- FORTE ENGINEERING SRLcoreFORTE ENGINEERING SRL based in Soresina, Italy provides representation and service support in Italian market.
- Sandra Schneider (Schneider - Partner für Qualitätsmanagement)minorSandra Schneider assisted in introducing the certified management system and supports ongoing compliance with standards and process optimization.
- B·A·D GmbH (Partner für Gesundheitsvorsorge und Sicherheitstechnik)minorB·A·D supports H+H in implementing occupational safety measures and health management. Health and safety are considered essential for quality and reliability.
- VDMA (Verband Deutscher Maschinen- und Anlagenbau)minorH+H Engineering & Service is a member association of VDMA, the key network for mechanical engineering in Germany and Europe. Membership keeps the company informed about current trends and enables participation in significant developments.
Scale indicators9 records
Recent moves7 records
Expansion highlights6 records
H+H Engineering & Service competitors and assessment
Company assessmentDirect peers
- Hug Engineering: Swiss-based SCR system specialist serving marine, locomotive, and stationary combustion markets with custom-engineered NOx reduction solutions. Closest like-for-like peer to H+H in terms of project-based sales, custom catalyst/reactor design, and Tier III / Stage V compliance focus.
- Yara International (NOxCare / Yara Marine): Norwegian chemical company that, through its marine division, sells urea-based SCR systems (NOxCare) and reagents for maritime emissions compliance. Directly comparable to H+H in marine SCR scope and addresses the same Tier III retrofit market.
Broad incumbents
- Wärtsilä: Large marine engine OEM that supplies integrated SCR packages on its own engines and as retrofit solutions. Many H+H reference projects (Silja Symphony, AKOFS Seafarer, North Sea Giant) are built on Wärtsilä engines, making Wärtsilä both a major incumbent competitor and a customer ecosystem partner.
- MAN Energy Solutions: Major supplier of large marine and stationary engines with its own SCR aftertreatment offerings. Competes with H+H on integrated solutions but also represents an engine platform that H+H integrates with via retrofit projects.
- Caterpillar Marine / Solar Turbines: Engine and gas turbine OEM whose products (e.g., G3616, G3608, LM6000 platforms cited in H+H's Dominion and Danville references) frequently require third-party SCR integration. Competes in stationary SCR but relies on specialists like H+H for space-constrained or non-standard installations.
- Johnson Matthey: Global catalyst manufacturer with a substantial emissions control portfolio including SCR and oxidation catalysts for industrial and automotive applications. Represents the upstream catalyst supply alternative to H+H's in-house extruded catalyst approach.
- Mitsubishi Power: Supplies gas turbine combined-cycle plants and associated emissions control systems, including SCR for utility and industrial applications. Broad incumbent competing for large stationary DeNOx projects that overlap with H+H's stationary SCR business.
- Bosch (Emissions Systems / Bosch Rexroth): Diversified industrial supplier with SCR / DeNOx and exhaust aftertreatment offerings across automotive, off-highway, and stationary applications. Represents a scaled, capital-rich competitor in the broader emissions control market.
Emerging players
- Clean Diesel Technologies (CDTi): Specialist in advanced catalyst materials and emissions control technologies for diesel and natural gas engines. Comparable to H+H in catalyst-focused differentiation but oriented more toward light-duty and on-road applications.
- DCL International / DCL Europe: Catalyst and oxidation-catalyst manufacturer that is already a distribution and oxidation-catalyst partner of H+H. Direct overlap in catalyst component supply for SCR and oxidation systems in stationary and marine applications.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
H+H Engineering & Service social profiles
Digital presenceH+H Engineering & Service compliance and trust
Trust signalCompliance5 records
H+H Engineering & Service financial estimates
Financial estimateRevenue estimate
Valuation estimate
H+H Engineering & Service leadership team
Management profileNumber of profiles
Profiles6 records
H+H Engineering & Service funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
H+H Engineering & Service M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about H+H Engineering & Service
What does H+H Engineering & Service do?
H+H Engineering & Service GmbH designs, engineers, manufactures and services Selective Catalytic Reduction (SCR) systems for exhaust gas cleaning across marine, stationary industrial, and greenhouse applications. The company delivers complete, custom-engineered SCR installations including catalysts, urea injection systems, PLC-based controls and proprietary CaReCon remote monitoring software, and also operates a fertico2 system for CO2 enrichment in greenhouses.
Is H+H Engineering & Service a public or private company?
H+H Engineering & Service is a private company. It is classified as family owned and is currently operating.
When was H+H Engineering & Service founded?
H+H Engineering & Service was founded in 2007. It employs 11 to 50 people.
Where is H+H Engineering & Service based?
H+H Engineering & Service is headquartered in Sonnefeld, Germany, in the Europe region.
How does H+H Engineering & Service make money?
Six revenue lines are on record. SCR System Equipment Sales are the primary driver. The others are service and Maintenance Contracts, spare Parts Supply, remote Maintenance and Reporting, operator Training and catalyst Management Services.
Who are H+H Engineering & Service's main competitors?
Direct peers on record are Hug Engineering and Yara International (NOxCare / Yara Marine). Broad incumbents are Wärtsilä, MAN Energy Solutions, Caterpillar Marine / Solar Turbines, Johnson Matthey, Mitsubishi Power and Bosch (Emissions Systems / Bosch Rexroth). Emerging players are Clean Diesel Technologies (CDTi) and DCL International / DCL Europe.
Does H+H Engineering & Service have an API?
No public API is recorded for H+H Engineering & Service.
What industry is H+H Engineering & Service in?
H+H Engineering & Service's product category is Emissions Control Equipment. Its primary akta.pro industry code is EUAEALAL, Emissions Controls & Environmental Retrofit Services (SCR/FGD/ESP, CEMS), with a secondary code of IMAEAIAC, Environmental & Emissions Control Catalysts (DeNOx/DeSOx/DOC/CO Oxidation). Its NAICS code is 333413 and its SIC code is 3564.