EWC Controls Forum

I am thinking about adding a steam humidifier to an existing two zone system. A concern I have is the steam condensing and corroding the URD dampers. What is a safe distance between the humidifier and the zone dampers if the humidifier is in the main supply run upstream of the bypass and zone ...

Thanks, Eric for the quick response.

My present 10 SEER system has two zones and a constant, single speed PSC blower motor. I am going to change-out the system to a 14 SEER system with an ECM blower motor. Can I leave the barometric bypass damper as is, or do I need to change to a DP sensor? Thanks

that pressure drop is hardly worth any concern. Thanks for your fast reponse.

In designing duct systems, it is helpful to account for all of the system component pressure drops. What is a reasonable estimate for the pressure drop (in. w.c.) or equivalent length (ft.) for a round damper