High-efficiency particulate filter, or HEPA air filter is the short name of varieties. HEPA filters are used in many applications in the standard. These include vacuum cleaners, medical applications, automobiles, aircraft and household appliances can be counted.

HEPA filters are defined as standard depending on the DOE will no URL at least 99.97% of airborne particles in the size of 0.3 .mu.M. Minimal resistance against the flow of air filters, or pressure drop, generally designated 300 near P is the nominal flow rate.

HEPA filters, air, having a critical role in preventing the spread of bacteria, viral organisms and infection resulting from them. Generally, HEPA filtration system used in the medical sector, thanks to the filter material captured live bacteria and viruses that high energy ultra-violet light units shall not together. Some very high quality classified as HEPA units are having the effect of 99.995%, which guarantees protection against harmful degree weather the current very high levels.

HEPA filter and how often hygienic air handling filters should be changed ?

Filters not depending on time is changed according to the result of contamination pressure measurement.Filter change in nominal flow pressure overall clean / new filter initial pressure of two (2) is solid. For example, the initial pressure of 150 Pa, which changes the pressure of the HEPA filter is about 300 Pa.

However, poorly designed from the beginning in our country in terms of size of the project and completed the installation of pressure HEPA filter systems are also available. For example, the initial pressure is supposed to be a maximum of 150 PA 250 PA or a higher initial pressure HEPA filters are available. In these cases, specifying the hepa filter intake air flow to pass through a low initial pressure while the filter manufacturer or vendor of the filter HEPA filter should be requested. The fibers used in air conditioning plants, bags, Van Compact filters are also generally clean the contamination pressure nominal flow / pressure of a new filter initial two (2) is replaced reaches the floor. HEPA filters are deliberately selected and duly maintenance of the system with central filter HEPA filter life can be up to 2-3 years.

HEPA filters should be aware of when buying?

• Over time it has the risk of cracking MDF casing instead of the aluminum cased HEPA filter HEPA filter should be preferred. MDF casing in developed European countries abandoned the use of HEPA filters.
  
• HEPA filters HEPA filters, wire mesh protected hasarlanarak is very easy to lose economic value in the shipping and assembly should be preferred.
  
• Filter projects by controlling the amount of air must be notified prior to the purchase of the HEPA filters must be taken into account in the design of the filter and the filter's initial pressure providers should be allowed to exceed 150 Pa at the nominal operation. This sensitivity you low energy consumption, long filter life, thereby providing economic advantages more hygienic operation.
  
• After each filter change must filter leakage test (DOP / PAO) must be built.
  
• Filter packaging and filters in the delivery phase in order to establish whether damage during shipping necessarily should be inspected visually, no visible to undergo economic loss damages should be reported to the supplier and shipping company based official report with the transport element.
  
• Filters should never be in contact with the filter media during the installation. Piercing and cutting like a screwdriver in the hands of people who should not fitting during assembly tools.
  
• Replacement HEPA filters must be taken to avoid risks to be completed during the validation testing as healthy.
  
• HEPA filters that keep your hands to spare or stock should be stored in packaging and dry environment. Filters should never be allowed to load and other items to be placed on the packaging.
  
  

Does every HEPA filtered ventilation system environment provides hygiene?

Hepa filter in the ventilation system in the field by a sterile ventilation system does not mean that ensures proper hygiene. The system that is suitable HVAC performance tests (PQ) made the decision.

Each HEPA filter system is suitable to the standards?

A HEPA filter even if passed successfully the HVAC system performance testing may not conform to the standard. Because;

• The equipment used in the ventilation system may not be suitable for hygienic rules. For example, the lack of air conditioning ventilation plant hygienic plants and even plants instead of duct fans and air conditioners are running our country into the literature as asepticizing in the sterile field conditioned to use air cleaners, be subjected to tightness test during the manufacturing and assembly of the air channel some of this non-compliance.
  
• The use of equipment that require maintenance in the sterile field (asepticizing etc.), Easy to use and does not conform to the standard equipment can not be fully cleaned.
  
• Ventilation system, reversal of the positive pressure due to contamination of the necessary measures are taken by filtration, air change rate of reduction and so on. It can not protect the effectiveness in terms of hygiene throughout the year due. It therefore established in accordance with the purpose of hygienic ventilation system able to maintain its relevance even in the changing conditions due to automation.
  
  

No hygienic ventilation systems automation system will enable the continuation of the conditions are not appropriate standards. The principles described above reasons, the ventilation system must be passed prior to performance testing test setup and control. HVAC performance testing, installation and testing of control should not be confused.