HTM Maintenance
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How It Works
About HTM Maintenance
Our HTM maintenance service ensures healthcare ventilation systems operate in compliance with Health Technical Memorandum standards, protecting patients and staff.
We perform specialist maintenance of critical ventilation systems in operating theatres, isolation rooms, sterile services, and other clinical environments. Our comprehensive approach includes airflow verification, HEPA filter integrity testing, pressure cascade monitoring, and detailed documentation for regulatory compliance.
Our experts understand the unique requirements of healthcare facilities and work to minimise disruption to clinical operations.
Service Benefits
- Assured clinical safety
- Full regulatory compliance
- Detailed verification reports
- Minimised clinical disruption
Featured Project
AHU Fixes in Devon to meet Hospital HTM 03-01
Objectives
In healthcare, exceptional Indoor Air Quality (IAQ) is non-negotiable. As per the NHS's HTM documents (particularly HTM-03-01: Specialised ventilation for healthcare premises), certain rooms like operating theatres require extremely stringent IAQ checks and services to ensure they stay sterile and safe. What many people don't realise is that hospitals use rather unique systems to keep their air exceptionally clean, so an office HVAC can look totally different to a hospital's HVAC system. Despite these units being integral to keeping vulnerable patients safe, servicing hospital Air Handling Units (AHUs) often feels like the Wild West: contractors dangerously cutting corners while their reports and paperwork tell a different story.
At one hospital, an AHU looked fine on record, but we were shocked when we opened it up during our inspection. A frost coil was fitted incorrectly, its fins were totally corroded (possibly a result of its incorrect fitting), and dirt was so impacted in the components that no air was passing through. Staff had kept “maintaining” it by swapping filters and ticking boxes, without realising the unit wasn’t working at all. It goes without saying that the negligence of prior contractors had resulted in physical damage to this healthcare facility's HVAC, potentially resulting in higher rates of infection and disease amongst patients if this issue wasn't fixed promptly.
Solutions
We inspected the AHU, confirmed the faulty coil as the cause, and cleaned what we could. The corrosion and embedded dirt showed the damage of long-term neglect, but the bigger issue was accountability. We advised the hospital to replace the coil and, crucially, to tighten oversight of contractors, ensuring servicing is more than a paper exercise.
Unfortunately, in cases where AHUs have been neglected for such a long time, dirt and debris can become virtually impossible to remove entirely which is why we advised the hospital to pay closer attention to their air quality and HVAC systems in the future.
Results
Our inspection revealed issues that routine servicing had overlooked, highlighting where the AHU had failed and the risks this posed to patients and staff. By addressing the blocked coil and recommending corrective action, we improved air quality, safeguarded health, reduced energy waste, and helped prevent further wear on the system.
The broader lesson is clear: in healthcare, exceptional IAQ protects both people and budgets — but only when contractors are properly held accountable and their work is thoroughly verified.
Challenges
- Neglected HVAC
- Patient health at risk
- HTM Compliance at risk
"It can come as a bit of a shock to realise that even in hospitals, where you could argue IAQ is at its utmost importance, certain contractors still decide to cut corners and create significant issues down the line. HTM documents exist to keep patients safe -- if we don't follow that guidance, we can place people in serious risk. At the end of the day, this is more than 'guidance' because it protects the hospital from liability and prosecution if their patients suffer health complications as a result of their poorly-maintained HVAC systems."
Shaun Doran, Air Hygiene & IAQ Compliance Specialist
Health
Productivity
Energy saved
Insights
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Why Choose ARM?
ARM Environments brings specialist expertise in healthcare ventilation maintenance, with technicians specifically trained in HTM requirements. Our exclusive focus on air quality means we understand the critical importance of ventilation in infection control and patient safety.
Our SafeContractor and BESA certifications demonstrate our commitment to safe, quality work in sensitive healthcare environments. We maintain detailed verification records that satisfy regulatory requirements and simplify CQC inspections.
Unlike general maintenance contractors, we combine technical expertise with understanding of clinical requirements, ensuring your ventilation systems deliver the performance needed for safe patient care.
