I need to know if Vacuum Cleaners with Hepa Filters are more efficient than ones without. I have been looking at Eureka models. One does not have a hepa filter and claims to retain dust particles to 1 micron. The other model has a Hepa Filter and claims to retain dust particles to .3 micron.
Is there much difference between 1 and .3 microns?
Is the Hepa Filter worth the extra expense? They are quite expensive to replace.