Fully Compliant with NHS Guidance & Standards for UV-C Equipment in Healthcare
All MidthermUV products conform to the NHS Estates Technical Bulletin (NETB 2023/01B), the official standard for UV-C air cleaning devices in occupied healthcare spaces.
Self-assessed conformance based on independent NHS lab testing and engineering analysis
What is NHS NETB 2023/01B?
NHS Estates Technical Bulletin (NETB 2023/01B) is the official NHS England guidance document titled "Application of ultraviolet (UVC) devices for air cleaning in occupied healthcare spaces: guidance and standards." Published in May 2023 and updated in October 2023, this document sets the basic standard required for UV-C devices to be utilized in healthcare and patient-related settings.
The standard covers portable, wall-mounted, ceiling-mounted, and in-duct UV-C air cleaning units where the principal active element is UV-C at the nominal wavelength of 254 nm. It applies to all healthcare spaces with ventilation requirements, ensuring patient safety and effective infection control.
Key Requirements & MidthermUV Conformance
Compliance Status Clarification
NHS Lab Bio-Validated: Third-party tested and validated by NHS laboratory using Liverpool Biovalidation Protocol.
HTM03-01 & NETB 2023/01B Conformance: Self-assessed conformance based on independent testing results and engineering analysis. Not third-party certified.
Device Types Covered
Standard covers portable, wall-mounted, ceiling-mounted, and in-duct UV-C units.
✓ All four MidthermUV products covered
Wavelength Specification
254nm wavelength mercury-vapour lamps required for germicidal effectiveness.
✓ Philips Signify 254nm lamps used
Bio-Validation Testing
Liverpool Biovalidation Protocol required using Micrococcus luteus bacterial challenge.
✓ Liverpool Protocol testing completed
Lamp Operational Life
Minimum 1 year effective operational life (≈8,800 hours for 24/7 operation).
✓ 9,000 hours warranted (exceeds requirement)
Noise Requirements
Normal operation in occupied areas: ≤50 dB at 3m distance.
✓ All products meet ≤50 dB requirement
Safety Standards
UV irradiance ≤1 mW/m² at 20cm. Fail-safe systems to prevent lamp operation when cover removed.
✓ Enclosed design prevents UV exposure
Regulatory Compliance
CE/UKCA marking required. Should follow IEC 60601-1 principles for medical environments.
✓ Standard compliance certified
Ozone Safety
Must not produce ozone exceeding UK Workplace Exposure Limit (0.2 ppm).
✓ No ozone production confirmed
Liverpool Biovalidation Protocol
The Liverpool Biovalidation Protocol is the NHS England Supply Chain's preferred method for validating the germicidal effectiveness of UV-C air purification devices. This rigorous testing protocol is specifically mentioned in NETB 2023/01B as the standard for bio-validation.
Protocol Details:
- Bacterial Challenge: Uses Micrococcus luteus as the test microorganism
- Test Conditions: Ambient temperature 23°C, relative humidity 50%
- Measurement: Provides evidence of germicidal effectivity at given airflow rates
- Real-World Validation: Tests device performance under actual operating conditions
MidthermUV Bio-Validation Status
All MidthermUV products have successfully completed Liverpool Biovalidation Protocol testing, earning the "NHS Lab Bio-Validated" certification. This independent testing confirms our units achieve the claimed pathogen reduction rates under real-world conditions.
Proven NHS Deployment Track Record
Beyond laboratory validation, MidthermUV products have been successfully deployed in multiple NHS healthcare facilities, demonstrating real-world effectiveness in occupied patient care environments.
Aintree Hospital Study
NHS University Hospitals of Liverpool
Independent clinical validation by Professor Tony Fisher demonstrated 84-93% airborne pathogen reduction across occupied NHS patient rooms using CT600 ceiling units.
Won BBH 2025 Gold Award for Best Patient Safety Initiative →
Maidstone Hospital RAPS Ward
Maidstone and Tunbridge Wells NHS Trust
In-Duct UV-C system installation achieved 80% airborne pathogen reduction and100% HTM03-01 2022 compliance in less than 1 day installation time.
Won H&V Awards 2022 Product of the Year →
Design Methodology Aligned with NHS Standards
MidthermUV products are engineered from the ground up to meet and exceed NHS NETB 2023/01B requirements. Our design methodology incorporates several key principles:
Over-Specification for Reliability
Units are deliberately over-specified with greater UV-C power than the minimum required. This ensures performance is maintained throughout the 9,000-hour lamp lifetime, even with small amounts of dirt accumulation on lamp surfaces.
Verification Access Ports
NETB 2023/01B requires a 10mm access port to the reaction chamber for verification measurements. All MidthermUV products include this feature, enabling point measurement of air velocity and UV-C irradiance during annual maintenance checks by competent persons.
Patented Filter Sanitisation
UK Patent GB2615993B covers our innovative filter sanitisation technology, which prevents pathogen build-up on filter surfaces. This addresses a key concern in healthcare environments where filters can become secondary contamination sources.
HTM03-01 Compliance
Beyond NETB 2023/01B, all products comply with NHS HTM03-01 ventilation standards for healthcare premises, ensuring proper integration with existing HVAC systems and meeting air change rate requirements.
NHS-Compliant UV-C Air Purification for Your Facility
Speak with our team to discuss how MidthermUV's NHS NETB 2023/01B compliant products can enhance infection control in your healthcare facility.