Some pics of the existing upgrades
This original air pump was similar to one of these:
They are junk. Super noisey and don’t push much air. I replaced it with the biggest Danner Linear pump i could find which is probably overkill but i would rather too much air than not enough. It gives off more of a hum like a hot tub pump instead of the ratcheting clackclackclack of a cheaper unit.
Biggest issue was it was too tall so i had to cut a hole in the lid but it panned out okay
From the department of should have been done from the factory i also installed 2 additional fans which can be seen on the right side which pushed air through the light chamber to help cool it. I also installed butyl all on the inside of the JB to help mitigate sound transmission through the metal.
And lastly i upgraded the air filtering that i might redo
The blunderbox for some reason doesn’t come from the factory with any carbon filtering on the mother/veg chamber so there is quite obviously a pretty strong smell during veg that needs to be taken care of. The only carbon filter the box does come with is a small canister filter about 8" tall bolted to the back of the flower chamber. What i did was move that 8" filter and put it on the veg chamber (which can be seen at the far right corner of the photo) and then installed an 18" filter with a AC Infinity T4 and a drier duct to wrap it around the corner because the whole assembly was too long.
One of the reasons i might redo the air filtering on the flower chamber is that I have since learned that for every 90 degree bend there is a drastic reduction of air flow which pretty much negates a lot of the benefits of having a larger fan and bigger filter by having 2 90’s takeing the intake around the side. So if i can get the whole assembly shorter and use 1 90 I’ll get better air flow.
A second option is finding more of the 8" filters and just adding several of them (the fan blows directly into them) but i have yet to find a reasonable source of them and BCNL charges a small fortune which I’m not willing to pay. The BCNL also require a mount for an additional $15
https://growbcnl.ca/collections/filters-and-fans/products/custom-bcnl-4-filter
I’m open to ideas.
Third option is sell the T4 and get a T6 or T8 to make up for the corners and use a reducer into the drier duct.