The existing domestic stainless steel ventilators have no difference between good and bad quality, since stainless steel ventilation adopts stainless steel of different material quality. Under normal circumstances, anticorrosion of higher-quality 304/ 2B stainless steel has been uncommon compared with stainless steel of other materials. However, confronted with some badly corrosive and terrible air atmosphere, such as shore workshop, acid washing workshop and so on, it far exceeds its ability. If adopting higher-quality stainless steel with nickel as raw materials of ventilator, its price is too high for most customers. But current common aluminum alloy ventilator has short service life due to the neglecting of anti-corrosion and anti- oxygen.

The comparison of weight and service life of ventilators made from different materials  

High- quality raw materials

Fluorine carbon polyester coating aluminum alloy roller, the materials from the previous treatment to terminal products are all adopting famous raw materials with good international credit and stable quality.

Ventilator Exhaust Calculation and Determination

1 Determine the indoor volume of the building in cubic meters (length×width×height) = VOL
2 According to the building type, determine air changes per hour required from the table 1 =N  
3 Determine the standard wind speed according to local weather records (1.2.3.4and 5m/s), thus air exhaust capacity can be reached from table 2 = L p

Table 1:  Air changes of different types (N)