Just run highly rated MERV filters. I use a bit of a bulky MERV 14, but as long as you can cycle the total air volume of the space you're cleaning quickly, anything with 20+% uptake on small particles will work over time.
The experiments and data on that site (I assume it's yours?) don't give me nearly the same conclusions you do - Almost all decent filter setups will hit the same particulate equilibrium asymptote with the only real difference being the duration it takes to get there - a negligible plus or minus half an hour. Speed is not aim. It's the maintenance of the steady-state that is.
If the filter stays on, the air stays clean (barring total capacity issues - you can't filter a huge house with a single box fan).
So the only real roadblocks are human factors that would 1) make people skip making a filtering setup and 2) make people want to turn off the filter. This is where the real UX comes into play.
> Almost all decent filter setups will hit the same particulate equilibrium asymptote with the only real difference being the duration it takes to get there
I'm not doubting this, but do you have any evidence? According to the specs, by definition a MERV 14 should leave at most 25% of all particles size 0.3 microns or larger in one pass, while a HEPA filter can leave at most 0.03%. It's plausible but not totally obvious to me to me that this means that a MERV 14 will leave at most a fraction 0.25^k after k passes (though it's plausible). If so, that would suggest you need around 6 passes through a MERV filter to get equivalent filtration to 1 pass through a HEPA filter. (Airflow might be 6 times as high.)
The experiments and data on that site (I assume it's yours?) don't give me nearly the same conclusions you do - Almost all decent filter setups will hit the same particulate equilibrium asymptote with the only real difference being the duration it takes to get there - a negligible plus or minus half an hour. Speed is not aim. It's the maintenance of the steady-state that is.
If the filter stays on, the air stays clean (barring total capacity issues - you can't filter a huge house with a single box fan).
So the only real roadblocks are human factors that would 1) make people skip making a filtering setup and 2) make people want to turn off the filter. This is where the real UX comes into play.