Model F1 Res Sprinklers are used for Residential Fire Pro- tection according to UL 1626 Standard*. For ceiling types: Smooth Flat Horizontal, or beamed, or sloped, in accordance with NFPA 13D, 13R, or 13 2013 editions. Be sure that orifice size, temperature rating, deflector style and sprinkler type are in accordance with the latest published standards of The Na- tional Fire Protection Association or the approving authority having jurisdiction.