Strong capacity and quality assurance make HaoAir Purification a leader in Rigid box filter. The pass box manufacturers series is widely praised by customers. The product features great hardness. The metal materials used have been carefully heat treated in order to increase the hardness. The product's rigid frame forestalls shrinking or bending. The product is suited to the various kinds of climates, which will help people save in energy, insurance, and repair costs. The product dedicates to keeping a cleanliness class of 10000-300000.
HAOAIRTECH has a lofty aspiration to be a pioneer in producing custom HEPA air filters. Call now!