astronomy420a
omBUDsman
here's a little smootch!
Use whatever is available for insulating, just cover with reflective surface to reduce thermal gain from light.
For the air pump aim for more than 2 L/min per airdome. Have you chosen nutes yet???
If you can cover the door opening with a blanket etc it may help( &dont aim circulation fan toward opening...)
Best of luck bro..:smokebuds: