Mount the detector with the sintered end pointing down. A spacer or stand-off (1/4 to 1/2 inch) may be needed to allow adequate clearance for the detector and. Although no specific spacings have been allocated for the detectors used for the 0 to 300 ft/min clean air velocity application, use 30 foot center spacing (900 sq ft) from NFPA Standard 72 Chapter 5 and CAN/ULC-S524, if practical, as a guide or starting point for a detector installation layout. The duct detector should, when possible, be located a minimum of six duct widths downstream from a source of turbulence (bends, inlets, or deflection plates). Refer to NFPA 90A, 72, and 101 for more. Before installation, it's important to know what makes up a distribution box. Let's break it down into two main parts: the outer shell and the electrical parts inside. To this end, an experimental distribution panel was fabricated and four smoke. The purpose of this study is to develop a smoke detector that can be installed inside distribution panels and to propose an optimal smoke detector position based on the influence of the position on detection performance. No part of this document may be copied or reproduced without the express written permission of Honeywell Analytics. While this information is presented in good faith and.