Hi all,
There's some great information here, on a confusing subject! I've nearly finished building my 6x5m workshop, so trying to plan the extraction system. My question regards the choice between HPLV and LPHV systems, as like most here (I suspect), budget and space dictate that I choose one or the other and make the best of it.
I am currently leaning towards a wall mounted HPLV extractor, e.g. Record DX5000 or Numatic WMD750, both of which apparently filter down to 0.5 micron. As I understand it, the main drawback to these systems is the way they cope with large chips, particularly those from a planer thicknesser. If this becomes a problem, I could easily add a separator attached to a dustbin at a later date.
The alternative would be a LPHV with a fine filter such as Axminster CT-90HB, but then it seems I would still need a small canister type vac for hand held power tools, to avoid reducing the air flow with a 32mm adaptor. Also I gather that the bore of the pipe is more critical in these systems, so 100mm may not cut it. So by the time I've bought the extra vac plus 125-150mm ducting, the system works out a fair bit more expensive for similar capabilities.
Are there other payoffs here that I'm not picking up? If it helps, the machines in use will be:
Planer/thicknesser
Table saw
Band saw
Router table
Drum sander
Spindle sander
Random orbital sander
Detail sander
Hand-held routers
Many thanks.