"Charles A. Sherwood" wrote in message
...
outside. I highly recommend going that direction. Filters limit the
ability of the best units and are but one more thing to maintain. By
discharging outside instead of inside, you remove troublesome dust
instead

Discharging outside seems the best for removing dirt. However I wonder
how much heated air it removes from the house? Is it significant?

Similar question. I have a baldor 10 inch grinder with dust collecter
which discharges into a big cloth bag. I considered discharging
outside but at 500cfm, but I figure I would be loosing LOTS of heated air.

I would also like to plumb this dust collector to remove the dirt from
my small rockwell toolmakers grinder. The tool makers grinder might run
for 30-60 minutes for big jobs. Blowing 500cfm outside for an hour seems
like a lot of heated air. I figure a multistage dust filter makes more
sense.

chuck

Yep, losing heated air is the down side. Not a problem during warm
seasons. Lots of problems with filters if you use your system in the shop,
though, one of which is starting fires when grinding. It's not very
difficult to ignite the contents of a vacuum if you pick up sparks, makes no
difference if you filter, or not.

Harold