First ever grow & with free seeds

The T-series with the fancy digital controller uses the 4-pin Molex connector...Make sure whichever you get has the same connector, and I think you're good. I'm eventually going to get a matching S-6 to go with mine. I think it's a really cool implementation that you can have both fans set for the same speed and parameters and ramp up and down together accordingly. Also, if you go for one of the 'duct' fans, you can place it in such a way to keep your tent dark when needed rather than the flat fan which will have to go at one of the other tent openings.

I have a rexial exhaust fan from ac—- not linked to the controller, but very powerful and not expensive!