# Council Regulation (EC) No 1/2005 of 22 December 2004 on the protection of animals during transport and related operations and amending Directives 64/432/EEC and 93/119/EC and Regulation (EC) No 1255/97, Division 2: Compartments where animals are to be transported shall be equipped with a forced ventilation system which gives sufficient capacity to change the air in its entire volume as follows:

Extent: E+W+S+N.I.

(a)40 air changes per hour if the compartment is fully enclosed and the clear height is less or equal to 2,30 meters;
(b)30 air changes per hour if the compartment is fully enclosed and the clear height is more than 2,30 meters;
(c)75 % of the above relevant capacity if the compartment is partially enclosed.

---
Source: https://www.legislation.gov.uk/eur/2005/1/annex/I/chapter/IV/section/1/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2005-1/annex-I/chapter-IV/section-1/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.