There are only two drywall vacs that I know of Porta cable & Loveless made for drywall you could also use a pullman vac that has a soot bag used for cleaning furnaces, I have a porta Cable and a pullman I use the porta Cable Vac just for drywall because its not very good as a regular vac, It could be used as a shop vac but tends to plug up the filter fast and if you use bags it would probaly be alright but at $25 for three bags which get distroyed when taking off it gets expensive