Bator Fan Placement

[4estgump]

I am building a bator and was wondering the best place to mount the fan.
My thoughts are on the lid blowing down, because heat moves up. I have the light on one end and the thermostat on the other end. The turner is close to the thermostat. All ideas are very welcome.
Thank You 4est

 

[LoveMyBirds]

The Hova-Bator fans blow down..

I just put 2 fans in 2 of mine that didn't have fans with 1/4 or 3/8 spacers between top and fan

The Inc. that had the fan seemed to work better on the first round of hatching I did so far.. Less sticking and better hatch..

I kept the humidy around 40-45%..