Hospital ventilation standards

Hospital ventilation is shaped by overlapping standards. HTM 03-01 sets the core expectations; the HBN suite anchors room-by-room design; BS EN ISO 14644 covers cleanroom classification; CIBSE and BESA guidance address hygiene and commissioning. This page outlines how they fit together for UK hospitals.

The standards stack

HTM 03-01 provides the ventilation framework. HBN documents (HBN 26, HBN 04-01, HBN 04-02, etc.) provide room-specific design context. ISO 14644 covers cleanroom classification in pharmacy and ATMP. CIBSE TM43 and BESA TR19 (Air) cover hygiene. Local NHS trust policy may layer additional expectations.

Using the standards in practice

Most ongoing work — assessment, validation, hygiene, monitoring — is shaped by HTM 03-01 Part B and the relevant ISO 14644 class for cleanrooms. Design and major refurbishment work draws more heavily on Part A and the HBN suite.

Where the standards interact

Conflicts and ambiguities are common. A pharmacy aseptic unit will be informed by both HTM 03-01 and the relevant Quality System for pharmacy compounding. We work with estates, IPC, pharmacy and clinical leads to align the standards into a single workable verification programme.

Next step

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