Air Flow is as important as water & Light, especially in a Grow Box...

Here's my set up from the front and the door closed...

Two 6" in-line duct fans ( Home DePot $25 ) on the top blowing out and two in-takes at the bottom...

Left top draws hot air from the top of the grow space...

Right Top draws thru the light just above the canopy...

Bloom Room Air is exchanging at 5 times per minute thru out the 12 hour light cycle...

Fan on the right moves up with the light, blowing across the canopy...

Second photo is with the door open and you can see the internal workings...

Third photo is of the other half of the Canopy I could not get in the first photo...

Hope this gives ya some ideas...