How would I calculate actual flow rate when using a VFD? I know the flow [GPM], head [ft], VFD set %, and VFD speed at 100% [RPM].
I know I'm supposed to use the pump affinity laws, just not sure where to start. Any help would be appreciated!
Could a unit heater designed for steam be used for hot-water applications? I cannot find a hot-water unit heater that will meet project specs for max entering water temp. There are steam units for which the coil will meet those temps, but there is no steam service on this project.