In HHO Plus® we take pride in our work, only offering products that have been thoroughly tested and with proven results. We work very hard to make sure all our customers getfuel level satisfied.

HHO Plus Lda is a research-driven company dedicated to the development and manufacture of hydrogen generators and related electronic products.

At HHO Plus® we have been involved with HHO Hydrogen-On-Demand Technology development for the past 10 years, in an effort to do our share helping reducing fuel consumption and preserving the environment. It has taken great deal of work and research to produce one of the most efficient, practical and reliable HHO Systems available on the market today. Unlike many other companies, we offer complete kits which include everything you need for a successful installation in cars, trucks, boats, electric generators...

We offer 5 days a week customer support to answer all your questions or help you with your instalation:

Telephone: 00 351 244 697 116
(Monday to Friday, 9.00-18.00h, London Hour)




HHO Plus, Alternative Energies, Ltd

Zona Industrial Vieira de Leiria

Rua Manuel Joaquim Afonso Lote 10 

2430-837 Vieira de Leiria



CEO - Production and Finance: Frederico Ribeiro
CEO - Shipping and Marketing: Miguel Moleirinho

Technical and Customer Support
: Sandra Branquinho
Production Department: Izaac Junio and Fábio Silva
Shipping Department: Éder Matildes Silva