How about this?
Lights pull from lung room through sealed ductwork, then exhaust as one circuit.
Secondary exhaust that vents the froe space separately. You can run the secondary that vents the room at a lower CFM to mitigate neg pressure
Requires a second exhaust fan, but more flexible
Loving the Blumats. I do find that megacrop will tend to leave sediment in the Iines, eventually plugging the droppers. If I blow the lines out gently with some compressed air once a week, all is good
I'm running Mega-crop with Blumats so continuous feed. My standard mix is one tbs along with 15ml of cal mag per 5 gal TO water and it seems to work well. Plants stay green and just a slight hint of tip burn on some of the more sensitive strains
I'm going to be gifted a few Phantom 1000W DE ballasts. With only 8ft ceilings to work with, I suspect running them at 1000w would be far too much.
Conventional wisdom says that dimming SE HPS bulbs negatively impacts spectrum.
Would I encounter similar issues with dimming a 1000w DE bulb to...
Given your "fire and rescue" avatar, I would presume you are in the fire and rescue business. If so, then smoke the whole bag. You are going to want to be as fucked up as possible when you go to save some lives!
Rip it up!