Hi
I need frequency converters attached to a digital thermostat in order to automatically increase or decrease the speed of the fan depending on the desired temperature. Note the following clarifications:

I have 6 separate greenhouses with each greenhouse having 10 fans (3 phase, 380V, 1.1 Kw),
I have 2 separate bird aviaries with each having 2 fans (3 phase, 380V, 1.1 Kw),
I have an experimental area with 2 smaller fans (3 phase, 380V, 0.55 Kw),

The number of frequency converters required depends on the number of fans that each frequency converter could handle /control together. I sure hope I do not have to install separate converter for each fan. If it is up to me, then I would need one frequency converter per separate unit, which would 9 frequency changers + 9 companion digital thermostat.

anyone helps!