@Halvdan I thought it was a bit odd, but I appreciated the encouragement regardless. :)

@ebikefolder I found activated coal pellets for air purification use on amazon.

@AdminWorker Thanks. While disassembling I realized it doesn’t seem to leak grease through as I mistakenly thought first, but now I think the casing leaks tiny amounts of unfiltered air that builds up a layer of grease over the years. So I used kitchen spray and paper to gently clean the clogged entry surface area of the filter. It seems to have good suction power, we’ll see if the coal still works.

Otherwise, I’ve found active coal pellets for air purification use on amazon and figure it should be possible to cut the felt on entry side open, replace coal with new and glue on some new felt.

I doubt it’s any particular high end coal in these filters and that the €150 price is because of $2 proprietary plastic frame so they can.

@alcyoneous

There is a steel mesh under that is washable and a carbon filter inside. It’s a recirculating system so exhaust is back into the kitchen.