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FDBZ492 Siemens Duct Housing – 2 Wire without relay
A two-wire addressable or conventional duct detector (without relays) designed for direct use on heating, ventilating and airconditioning (HVAC) air-duct systems.
When equipped, the air-duct detector housing will signal the presence of smoke being carried through the duct system.
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|Dimensions||20 × 8 × 8 in|