There are two types of single-Grille, one for single events blinds, one for single fixed louvers. Yan'an single Grille. Grille can be used as single outlet and return air. Yan'an single Grille, Yanda air conditioning, single Grille company Wu County Yanda by the air-conditioning plant. Yan'an single Grille, Yanda air conditioning, single Grille is Wu County Yanda air-conditioning plant (www.wcydkt.com) (www.wcydkt.com) this year introduced a new upgrade, the above picture is only for reference, please call the contact phone book page or image on to obtain the latest information, contact: Wu Yusong.