You put quite some thought into your post. Good.
One thing, though.
Quote:
($29usd per cartridge…3 hr recommended duration), compared to $25 for high end sorb granules
Am not sure where you came up with the $25, maybe I'm misunderstanding it.
The Evo holds 4.4 lbs of absorbant, and Sodasorb 6-12 for example is $99/pail or $2.68/lbs.
So a fill costs $11.80 for a stated 2 hr duration, or $5.90/hr.
Since you're likely get more time than that, cost per fill come down.
Those numbers change with units.
For the PRISM for example they are $16.08/fill (6 lbs), good for at least 5 hrs.
Cost per hour for absorbant is $3.21.
Convenient as the cartridges are, currently they are too expensive in my opinion.
Almost twice as much per fill, three times as much per hour, and considerably less duration.