- Established: 1936
- Personal Members: 52274 (69 specialists on the HVAC chapter)
- Number of personnel in the office: Besides the headquarters in Lisbon, Ordem dos Engenheiros has 5 regional offices (North, Center and South of Portugal, Madeira and Azores) and delegations in different cities along the country. OE has a total number of 80 administrative workers.
Ordem dos Engenheiros is the Portuguese Association of Engineers. The members are integrated in colleges and specializations. The representation in REHVA is assured through the Climatização (HVAC) specialization.