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Negative pressure ventilator

Model CNDH
Use Generating negative pressure
Filter type Pre-filter, HEPA filter
Filter cleaning method Replacing activated carbon type


CNDH-Series negative pressure ventilator for hospital is to block the leakage of pollutants,
germs and virus by making the pressure of patient room lower than outside.
CNDH-Series can filter the pollutants and sterilize the germs and virus.


  • Quiet structure and adjustable airflow
    It is manufactured by low noise fan and design. The airflow is adjustable for the size of patient room.
  • Multi-step filter design
    Step 1, Pre-filter: Large size dust is collected by polyester pre-filter.
    Step 2. HEPA filter: 0.3μm particles are removed more than 99.97% by high performance filter
    to remove the harmful microorganism and radioactive dust.
    Step 3. photo catalysis Zeolite filter(option): virus and germs around
    the air is sterilized.
  • Photo Catalysis Zeolite Filter(option)
    Photo catalysis zeolite filter can sterilize the germ and virus in the hospital and laboratory.
    It also resolves the gas and removes the stink.
    It can be used semipermanently. (Lamp can be use about 1 year by 24hours running)
  • Digital manometer
    It indicates the pressure difference between inside and outside, so the generation of
    negative pressure can be checked. There is no need for additional negative pressure measuring


Model Max. Air Flow
Max. Pressure
Dimension Applicable area
CNDH 100 26 70 0.54 700 675 1,185 90

※ Without the height of caster


Photo Catalysis Zeolite Filter
: sterilize the germ and virus, resolve the gas and remove the stink.


  • 01

    Caster (Fixed after installation)

  • 02

    Available for changing the side of inlet

The Right service of Clean air Tech begins

with hope to contribute to the neighbors and society through the clean environment.
Our passion does not end by the accurate and detailed design, precise production, excellent quality and best performance through the installation and construction.
It is the spirit of fulfilling responsibility to dust collectors operated all around industrial sites as the air environment specialized company.
We, the whole member of Clean air tech believe that this is customer-centric right service.


  • Diagnosing service for dust collector performance and efficiency
    CAT provides right use, performance maintenance, diagnosing service for every dust collecting facilities.
  • Round visiting check-up
    We believe that all dust collectors should contribute to the improvement of working condition.
  • Repairing and replacing service for components and consumables
    CAT after-sales service always together wherever there is a dust collector.

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Comprehensive Solution

Formally registered for air environmental engineering and measurement agency
We have expert technician as air environmental professional engineer who completed the curriculum of Korea Occupational Safety and Health Agency .
  • Dust collection equipment design and production
  • +
  • Environmental permits and paperwork of the hazard prevention plan
  • +
  • Measurement of air pollutants in discharge facilities
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