hvac

I have a 3x3 with a mars reflector 192 currently housing my 5 12 day old seedlings. The temperature gets up to 94 without any vents opened up and with all of them opened and the door cracked its still a good 84-86. The problem is when flowering i don't want to have to vent this way bc of smell...

Can i cover my walls with sheets of ductboard? its the fiberglass board with a foil backing that's reinforced with nylon string that HVAC duct work is sometimes constructed of. my concern is the reflectivness. i cant find any word on anyone using it. i have a source for it in three different...

Just wondering if anyone has tried using zip ties in place of duct clamps to secure ducting to lights, fans, etc?