XFP508H C-Tec BS5839-6 Hush Button (Hochiki ESP)XFP508H BS5839 6 Hush Button (Hochiki ESP) A new BS5839 6 Compliant fire alarm solution for houses of multiple occupation (HMO's) Designed to sit on a Hochiki analogue addressable loop Each Hush Button has its own conventional detector circuit, conventional sounder circuit and onboard loop isolator Provides each HMO dwelling with a two minute silence facility and a 15 minute silence facility. See schematic for design layout (more images)