Question about Kärcher Professional NT 22/1 Ap Te L

yes, for wet use. not recommended for dry use, as the filter has to do all the work and therefore quickly clogs up when there is a fine build-up. coarse suction material should work.

Yes, I can do that when I connect it to the circular saw or router. Because if you saw a lot, the bag is quickly full. Sawdust then goes on the compost. Blow out the filter with the compressor from time to time.

Yes, it can work without a bag if you're sucking up water, but I'd advise you to use it with a bag if you're sucking up dust.

In principle, yes. Probably the filter simply clogs up more quickly.