Filter sets for itself and the cleaning is a big mess.

Have the vacuum cleaner to the bad opinion of my colleagues bought the mine said that the filter becoming clogged quickly. I have a small fireplace with 7KW and was initially to about 6 times use very satisfied. Then the sucker lost suddenly the suction and I suspected that the tank was full, and now I had to empty it. So I went out to the trash can, opened the sucker and noted that as only about 3 coffee mug full of ashes there were. Since I have no immediate neighbors turn I decided the filter with compressed air to clean again what the biggest disgrace was the imaginable. It took about 10 minutes and on the applied field was flying a huge ash cloud. I'm going as my colleague has already advised me before again use a hand brush. The vacuum cleaner goes back again.