Ventilation in a healthcare building is not the same job as ventilation anywhere else. In a hospital, a dental surgery or a care home, the air handling system is part of infection control, and it has to be designed, maintained and validated against a specific standard: HTM 03-01, the Department of Health’s technical memorandum on specialised ventilation for healthcare premises.
We work with facilities teams across the healthcare sector, and the questions we hear most often are the same: what does HTM 03-01 actually require, and how do we prove we are meeting it?
What HTM 03-01 covers
The memorandum sets out how ventilation should be designed, installed, operated and verified in healthcare settings. It splits into two parts — Part A deals with design and validation of new systems, Part B with operational management of existing ones. For most facilities managers, Part B is the day-to-day concern: keeping systems running to standard and being able to demonstrate it.
Critically, HTM 03-01 requires that ventilation systems serving specialised areas — operating theatres, isolation rooms, pharmacy clean rooms — are verified annually by a competent person. That verification checks air change rates, pressure differentials, filtration integrity and temperature control against the design intent.
Where systems fall short
The most common compliance gaps we find are not dramatic failures. They are drift. Filters left beyond their service life, pressure regimes that have quietly slipped as ducts have loaded up, or air handling units running well below their designed performance because coils and fans have never been properly maintained. None of these trip an alarm, but all of them put a healthcare ventilation system out of compliance.
Annual verification catches this, but only if the underlying maintenance regime is sound. Verification tells you where you are; planned maintenance keeps you there.
Getting and staying compliant
Compliance starts with knowing what you have. A full survey of the air handling and ductwork serving critical areas, checked against the original design specification, establishes whether the system can meet HTM 03-01 in the first place — older installations sometimes cannot without upgrade. From there, a planned maintenance schedule keeps the system in specification, and annual verification provides the documented evidence.
We handle all three: survey and assessment, ongoing maintenance to standard, and the works needed where a system no longer performs to its design. For healthcare clients, that documented chain — design intent, maintenance record, annual verification — is what stands up to scrutiny.
If you manage a healthcare premises and you are not confident your ventilation would pass verification, the sensible first step is an assessment of your existing air handling units against the standard.
