Intake or no...

Is there anything wrong with not having an intake fan. And just hooking up an exhast fan. And letting air come in from under the closet door. Or will this burn out your exhast fan moter?

Also if I don't have an intake fan hooked to the reflector assembly but do have an exhast tube/fan hooked to it will it have enouph pull to cool the room / light?

And Is there anything wrong with venting the hot air (after filtration) into the attic?? The floor of the Attic is insulated but not the roof itself. Should allow the heat to dissipate more before finding its way outside yes??

ive tried & seen tried both method's with & without of course its better to have & not need than to need & not have, but as long as ur temp's are ok and your egsausting the hot/stale air, as you mentioned youve created a vacuum that can pull cooler air from under & around the door frame, u bring bk memories fellow bud lover lol as the first time, i did it i used the very same method a long time ago, id say u will get a little heat probs if ur using hps's but if regularlly attended to u should be ok just make sure your fan keeps the tops cool