Seemed to be effective
My central vac seemed to be losing suction.  I followed the instructions and sent a sheet through each outlet and all were deposited in the dust bin.  Some extra dust and dirt seemed to come through and it also seemed to deodorize.  It didn't push through any significant clogs so maybe there weren't any.  However, the vac performance did improve so I think it would be a good regular maintenance item to have around!
Rating: 5 stars