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Join Bryan as he tackles a listener's question about duct smoke detectors, focusing on the Honeywell D4120W, in this short podcast. Uncover power supply choices, fan shutdown contacts, crucial installation advice, and much more! Don't miss it! Listen to the podcast by visiting the HVAC School website now. https://buff.ly/4bWNPfk #HVAC #HVACR #HVACSchool #SmokeDetectors #HVACPodcast #DuctSmokeDetectors #Honeywell #HVACTips #Techtips #HVACTechTips | HVAC School
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