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MIKROPERFORATION x PERMEABLE MATERIAL
 
 
Reasons for use of microperforation
Does permeable material enable better air distribution than microperforated material?
It does in some specific cases. The permeable material enables more uniform air diffusion at lower rate. Air flows from the microperforated material at higher rate and in some cases it may be a hindrance. In the area of about 10 cm from the diffuser we may expect rate of airflow of about 1 metre per second, but at the distance of 50 cm it reduces to about 0.2 metre per second. The specific value always depends on static pressure in the diffuser and density of microperforation. Thanks to very accurate measurements we have calculation methods that enable accurate calculation of the rate of flow under any occasions.

Prihoda s.r.o. decided to use microperforation for the following reasons:
1/ Microperforation enables to reach accurate value of airflow through the material, while the value is only approximate in permeable materials.
2/ Microperforated materials require only basic air filtration EU3 if compared with EU7 necessary as minimum in permeable materials. This way we reduce investment costs connected with more expensive filter as well as operating costs connected with the fan input that will be lower due to the lower pressure loss of the filter.
3/ In microperforated materials the pressure loss does not change, while permeable materials become clogged with dirt and their pressure loss increases and flow decreases.
4/ Permeable materials are “dirt collectors” from the air flowing through them, while microperforated materials made of artificial silk remains practically clean inside.
5/ Number of washings is much lower in microperforated materials if compared with the permeable ones, which means substantial saving of costs connected with maintenance for users.
6/ Microperforated materials enable accurate and any changes in air output in the induction unit length and circumference.
7/ Use of microperforation reduces requirements for materials in stock, because we don’t have to store some amount of materials of all permeability values and colours. E.g. 6 permeability values in 8 colours - it means 48 stock items if compared with 8 items if microperforation is used! The producer saves costs and it enables to reduce selling price of the final product.
8/ Micro-perforated diffusers provide better distribution of air with cooling of vertical installations. Whilst cold air from a permeable outlet falls quickly down and may cause air draught at the floor, micro-perforated outlet distributes air uniformly and mixes it quickly with air in the surroundings.