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  • Users: hvacnerd
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  1. hvacnerd

    Discharge temp needed to maintain room temp

    We have a project where the required temperature in the room is 70 deg F +/- 3. Someone told me that in this situation, you have to plan on 67 degree F supply air an d73 degree F return air. Someone else said to provide the required cooling we should discharge 57 degree F air. Will 57 degree...
  2. hvacnerd

    CO2 Sensors/ Demand Controlled Ventilation

    Has anyone had experience with Demand Controlled Ventilation (DCV) specifically using CO2 sensors? Does this type of system work well? How sensitive are the sensors (if one person walks into a room, will it notice and increase the airflow)? We are looking to use this to control the flow...
  3. hvacnerd

    Airflow Effect on Fire Sprinklers Exhaust Duct

    We are designing an exhaust system that requires fire sprinklers in the duct including the discharge stack. The fire marshall is concerned that the high velocity in the duct will blow the water up the stack and out. Does anyone know what velocity it would take to blow water up the stack? I...

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