Yeah that’s right, I should have said market for good air filters. My understanding of the problem is that most customers don’t know to insist on high CADR at low noise levels, and therefore filter area is low. A secondary problem is that HEPA filters are optimized for single-pass efficiency rather than airflow, but they sell better than 70-90% efficient MERV filters.
The physics does work though. At a given airflow level, pressure and noise go as roughly the −1.5 power of filter area. What IKEA should be producing instead of the FÖRNUFTIG and STARKVIND is one of three good designs for high CADR:
a fiberboard box like the CleanAirKits End Table 7 which has holes for pre-installed fans and can accept at least 6 square feet of MERV 13 furnace filters or maybe EPA 11.
a box like the AirFanta 3Pro, ideally that looks nicer somehow.
a wall-mounted design with furnace filters in a V shape, like this DIY project.
I made a shortform and google slides presentation about this and might make it a longform if there is enough interest or I get more information.
Yeah that’s right, I should have said market for good air filters. My understanding of the problem is that most customers don’t know to insist on high CADR at low noise levels, and therefore filter area is low. A secondary problem is that HEPA filters are optimized for single-pass efficiency rather than airflow, but they sell better than 70-90% efficient MERV filters.
The physics does work though. At a given airflow level, pressure and noise go as roughly the −1.5 power of filter area. What IKEA should be producing instead of the FÖRNUFTIG and STARKVIND is one of three good designs for high CADR:
a fiberboard box like the CleanAirKits End Table 7 which has holes for pre-installed fans and can accept at least 6 square feet of MERV 13 furnace filters or maybe EPA 11.
a box like the AirFanta 3Pro, ideally that looks nicer somehow.
a wall-mounted design with furnace filters in a V shape, like this DIY project.
I made a shortform and google slides presentation about this and might make it a longform if there is enough interest or I get more information.
That slides presentation presents me with a “you need access” screen. Is it OK to be public?
Fixed.