Manufactured by S.S. Engineering Enterprises
Product description
A dedicated air-handling unit for the operation theatre, with HEPA-filtered air flowing down over the operating table, positive pressure and controlled temperature and humidity. It is designed around the air-conditioning guidelines that NABH published for operation theatres in 2018.
Key features
- A dedicated air-handling unit for each OT, not shared with other areas
- Terminal HEPA filters in the ceiling above the operating table
- Unidirectional, downward air flow from a non-aspirating laminar diffuser
- Positive pressure kept in the OT at all times, including when it is not in use
- Temperature and humidity monitoring and display
- Filters reachable for service; testing and recording of air changes, particle count, air velocity, pressure and HEPA integrity
- NABH advises against window or split air conditioners in operation theatres
Product specifications
Typical values. The exact rating is confirmed for each project at quotation.
- Air changes: At least 20 per hour in total, of which at least 4 fresh air
- Air velocity: 25 to 35 ft/min (about 0.13 to 0.18 m/s) at the diffuser face
- Room pressure: At least 2.5 Pa above the adjoining areas
- HEPA filtration: 99.97% at 0.3 µm or better, covering one foot beyond the table on every side
- Supply air cleanliness (at rest): ISO Class 5 for Type A operation theatres, ISO Class 6 for Type B
- Temperature and humidity: 21 ± 3 °C (18 ± 2 °C for joint replacement) and 20 to 60% relative humidity
- Validation: NABH recommends every 6 months