Smoke alert and evacuation system for use for heating and air conditioning (HVAC) units, comprised of photoelectric smoke detectors, photoelectric duct detector, remote test station, AC to DC power converter with battery back-up, duct evacuation fans, schematic installation instructions

'ac':26 'air':11 'alert':2 'back':34 'back-up':33 'batteri':32 'compris':15 'condit':12 'convert':30 'dc':28 'detector':19,22 'duct':21,36 'evacu':4,37 'fan':38 'heat':9 'hvac':13 'instal':40 'instruct':41 'photoelectr':17,20 'power':29 'remot':23 'schemat':39 'smoke':1,18 'station':25 'system':5 'test':24 'unit':14 'use':7

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