The Ei144 is a Heat Alarm that runs on 230V AC mains power, and has a 9V alkaline battery back up in the event of mains failure. The 9V battery will last for up to 4 years in standby mode, and capable of powering the heat detector for up to 2 years in the event of mains failure. The Ei144 is supplied with the Easi-Fit base that allows very quick and simple installation of the heat alarm. The Easi-Fit base automatically connects both mains power and battery as the detector head slides on to the Easi-Fit base. The Ei144 has the ability to interconnect up to twelve alarms to allow all alarms to sound if just one of the interconnected alarms should be triggered. The Ei144 has built in circuitry to aid suppression of voltage transients and RF interference to further reduce the chances of false alarms under such conditions. The Ei144 heat alarm gives a fire warning when the temperature at the unit reaches 58¡C. Heat alarms are ideal for use in kitchens and garages, where the use of optical or ionisation alarms would lead to unwanted nuisance alarms.