1. Air treatment in the commercial sector

1.1 The tertiary sector

The tertiary sector covers a vast range of activities, from commerce and administration to transport, finance and real estate, business and personal services, education, health and social work.

It consists of the :

• mainly commercial services (trade, transport, financial activities, business services, personal services, accommodation and catering, real estate, information and communication);

• mainly non-market tertiary (public administration, education, human health, social action).

Establishments open to the public (ERP) are buildings to which outsiders are admitted. It makes no difference whether access is paid or free, unrestricted,...