Don't Fret...... My Cabinet gets around 90 Degrees some days and I still end up with 50% females and no hermis.

My avg temp is probs around 82 to 84. Espically when its dark perioud for the plants up top 12/12 and I can't open the Cab doors for the bottom thats runs 18/6

And wiring is easy. Just make sure you look at the Voltage and the Amps.

So If the Fan says, 12V DC 300mA

you need a power supply thats atleast 12V DC 0.3A

If you wanted too hook up 2 fans like that you would need 12V DC 0.6A

It ok to have more Amps than you need but not too much more. for example

I run three Fans on one power supply the Fans are 2 X 12V DC 300mA and one 12V DC 200mA

So the PS is 12V DC 1A so that still leaves me with a small bit of room for one more 200mA fan if I like.

Its pretty easy,, never Mix AC and DC currents, Most fans are DC (Direct Current) You'll be in big trouble if you do that.

Good Luck

kd