Paragraph 20 Automatic or mechanical equipment
Where the health and well-being of animals is dependent on an artificial ventilation system–
(a)
provision must be made for an appropriate back-up system to guarantee sufficient air renewal to preserve the health and well-being of the animals in the event of failure of the system; and
(b)
an alarm system must be provided to give warning of any failure of the system (which alarm will operate even if the principal electricity supply to it has failed).