SCHEDULE 4Part to be substituted for Part K (Ventilation) of the principal Regulations.

Part KVentilation

K3 Deemed-to-satisfy provisions for means of ventilation

The requirements of regulation K2 shall be deemed to be satisfied if the building is designed and ventilated in accordance with the relevant recommendations of the following documents, that is to say, in the case of—

(a)

a domestic building—

(i)

DOE (NI) Technical Booklet K: 1998: Sections 1 and 2;

(ii)

BS 5925: 1991;

(iii)

BS 5720: 1979; or

(iv)

BRE Digest 398; and

(b)

a non-domestic building—

(i)

DOE (NI) Technical Booklet K: 1998: Sections 1 and 3;

(ii)

BS 5925: 1991; or

(iii)

CIBSE Guide A: Section A4: 1988 and CIBSE Guide B: Section B2: 1988.