What is the initial and medium resistance of the high efficiency air filter on the FFU? FFU fans generally require a wind pressure of 270PA. If it is too large, the noise will be too large. * Good use of Suzhou Shiyi high quality centrifugal fan to achieve the desired results.
The initial resistance of the HFU high-efficiency filter, at a wind speed of 0.45m / s, the initial resistance of the high-efficiency filter is 70-100Pa, the initial resistance of the high-efficiency filter of different manufacturers is different. Generally calculate the beginning of the high-efficiency filter Resistance is calculated at 100Pa.
The filters on the FFU are generally selected to be highly efficient. The general customer chooses H13-U16 for efficiency. The final resistance is generally 2-3 times of the initial resistance. The final resistance is not strictly regulated. The product is replaced according to the environment. There are several ways, some are to take the whole product down and change the filter inside; in some places, there is no need to use this product, that is, there is no motor, its thickness is thinner than this product, and its same kind of product has TM RII, it is convenient to replace the person directly from the ceiling when replacing it.
Different thickness filters corresponding to the initial resistance on the FFU are different, usually as follows;
69mm 105Pa (H13) 110 (H14) 120 (H15) 140 (H16).
93mm 75Pa (H13) 80 (H14) 90 (H15) 110 (H16).