Healthcare HTM 03-01

HTM 03-01 — Specialised ventilation for healthcare premises — is the central UK reference for healthcare ventilation. It defines the design, validation, operation and verification expectations for ventilation in clinical spaces. This page summarises the structure and practical implications of HTM 03-01 for estates teams.

Part A — Design and validation

Part A sets expectations for new and refurbished ventilation systems: room classifications, air change rates, pressure cascades, filtration grades, redundancy expectations and commissioning validation. It is the document a design team works to when specifying new healthcare ventilation.

Part B — Operational management

Part B covers operational ventilation: routine inspection, ongoing validation, ventilation safety groups, fault management and the documentation expected to support compliance. Most ongoing healthcare ventilation work — including ours — is shaped by Part B.

Common HTM 03-01 issues we see

Drifted pressure regimes around isolation rooms, ductwork hygiene that has lapsed since commissioning, theatres operating below design air change rates, missing or outdated validation records, and ventilation safety group meetings that have stopped happening. All are recoverable with structured assessment and validation work.

Next step

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Independent technical support for hospital ventilation, HTM 03-01 compliance, environmental monitoring and infection control air quality.

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