Hotels and venues pay a nominal annual fee to participate. They provide a range of constant and dynamic data that is used to calculate a unit measurement of the carbon cost of an individual night use of a room (this varies by room type & size) or a half day use of a meeting or function room.

Over time they re-submit the dynamic data to allow for seasonal variations and changes in their energy management programme. Participating hotels receive a certificate of their rating, to support their CSR statements.

The data is made available via this website in cooperation with The Carbon Consultancy – partners in carePAR and recognised leaders in the field of environmental travel management.