Today @Omid @David_Neufeld and myself spent the afternoon working on the laser filter box. We washed the Pre filters, added new furnace filters and put in 6 trays of new charcoal. Also replaced the tape around the window where the exhaust exits the build as it have given up the ghost.
After all this work the filters are working really well!
@Omid picked up six furnace filters at Home Depot.
Pre filters and trays before cleaning
Washing the pre-filters (after shaking out the dust)
Pre-filters looking much improved back in their trays
Four furnace filters which were replaced
Old sparsely populated charcoal trays
Properly filled charcoal trays. There are six of these.
The tape sealing the filter exhaust to the window had given up the ghost after 2 years so the laser exhaust was coming right back into the space.
New Tape job. This is temporary until we find some all-weather tape that will hold up.
