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Solar obligation by the state of Rio de Janeiro, Brazil

Submitted by Baerbel Epp on June 2, 2009

The state of Rio de Janeiro is the front runner in terms of solar building codes on a state level. In January 2008, its state government approved a law that makes the installation of solar water heating systems mandatory for public buildings.





Rio de Janeiro


Lei N° 5184 from 2 January 2008


Solar thermal systems are mandatory for new and refurbished public buildings in Rio de Janeiro. Solar energy must cover 40 % of the annual hot water demand.

Date when law passed

Published on 2 January 2008

Date when law came into effect

January 2008

Target group

Public buildings

Special requirements

The materials and equipment used in implementing the system have to comply to the Brazilian norm NBR, and the Brazilian Technical Standards Association (Portuguese: ABNT).
A technical body will then test its efficiency, so that the system can be accredited by the National Institute of Metrology, Standardization and Quality Industrial (INMETRO).


Public buildings, in which it is technically impossible to install a solar thermal system, are exempt from this regulation.

Last review

March 2009

Further information

Cidades Solares: Governo do Rio de Janeiro:



State government of Rio de Janeiro

Secretaria de Estado de Obras – SEOBRAS” (state bureau of constructions)

Mr. Sérgio Poubel de Campos

Cabinet Chief,

Centro, Rio de Janeiro, RJ, Brazil



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