Setec Astronomy
Well-known member
mikebai1990 said:Also, if you are detailing in a car, why do you need to waste the HEPA filter?
It's not that your car has to be HEPA clean inside, it's what the vacuum emits that's at play here. Once upon a time I vacuumed my garage with my new shop vac prior to a detailing session and wound up with a bunch of marring.
Some fact finding and observation (including the dust streaks around the vacuum exhaust that showed up after a while) led to the conclusion that a lot of the concrete dust, etc. that the vac was picking up was going thru the filter and getting blown all over the garage (and staying airborne for quite some time).
That's why you'll see any home vacuum tests done in consumer mags have emission ratings, particularly for people with allergies who are trying to trap allergens, not blow them around their house at high velocity. I recently found out that HEPA filters are available for shop vacs; I haven't gotten around to trying one in mine yet. They recommend use with a disposable bag that goes in the shop vac cannister.