I just bought one of those AC Infinity 6" fans, but just the basic one, not the one with the climate control. So far seems like a pretty well built fan and it pushes air good and is pretty quiet. It is replacing a 4" inline fan that i was using as an exhaust w/ passive intake but due to hot summer now I've moved to both active 6" exhaust and 4" intake.
And as for climate control I use an arduino microcontroller with some hobbled together and definitely amateur code. The pic shows only one temp and RH sensor but it's easy to add more sensors like soil moisture, pH, capacitance, camera (for time-lapse photo grows), light sensor, etc. Using an I dunno what it's called 'excel macro program' called PLX-DAQ' you can plot and monitor the data your garden controller is logging in real-time and using some relays you can control when fan's, humidifiers/dehumidifiers/etc. are turned on/off.
You can go even further and control your garden remotely by setting up a webserver on a raspberry pi nano that is connected to your arduino and I'm sure there's more.
Cost are like ... super cheap, an arduino uno knockoff (elegoo) is like $10 and a rasp pi nano us under $10.
If you're curious for more info DM me I'll point you down the rabbit hole of arduino microcontrollers.
Oh and of course there are cheap solutions that do not require any of this that some people have already posted, this is just for the geeks, or those who like to expand what their controller can do. You can put enough sensors/advanced on one that it would easily rival the absurdely overpriced $100's AIO garden controllers that you'll see out there (except with far more control over what and how it does what it does. Oh, and they are fun, do not let anyone tell you otherwise. Electronics are fun gdamnit !!!!