Vacuum cleaners

I am shopping for a canister vac which will be suitable for
collections care (including cleaning textiles) for a large and
varied collection of fine art, decorative and miscellaneous objects.
Two of the models marketed by University Products (portable, HEPA
models; one with variable suction; $250-$500 range) looked very
promising. Both have been discontinued.

Alternatively, Im considering various commercial HEPA models
(VitaVac, Eureka Excalibur models and Miele) and several additional
models with better-than-average filtration (one by Miele, one by
Simplicity), but not "true HEPA".  Top-of-the-line Nilfisk or Kirby
models are out (too pricey). Comments and suggestions would be very
welcome, including the merits of having both variable suction and
"true HEPA" filtration.  Also, has anyone taken a commercial vac and
rigged a variable suction mechanism?

Im also curious to know if anyone had experience with the former
University Products models.  Is it worth pursuing the manufacturer
for a direct sale?

Kim Koons, Museum Technician
Office of Presidential Libraries
National Archives and Records Administration

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                  Conservation DistList Instance 12:11
                   Distributed: Friday, July 17, 1998
                       Message Id: cdl-12-11-019
                                  ***