# The Welfare of Battery Hens Regulations 1987, Paragraph 5


Insulation and ventilation of the building in which laying hens are kept shall ensure that air velocity, dust level, temperature, relative air humidity and gas concentrations are kept within limits that are not harmful to the hens.

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Source: https://www.legislation.gov.uk/uksi/1987/2020/schedule/paragraph/5 (the official version)
Page: https://openlegislation.uk/welfare-of-battery-hens-regulations-1987/schedule/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.