The functional operation of Protectowire Linear Heat Detectors is not affected by EMI or RFI. However, initiating device field wiring can act as a pathway for the transmission of EMI and RFI to associated control equipment. Protectowire FireSystem Control Panels have been designed to tolerate most occurrences of EMI and RFI. Installation environments subject to lightning strikes or extreme sources of EMI or RFI should be protected, similar to computers and other electronic systems with supplemental commercially available surge and filter protection (e.g. Ditek).