When you need static pressure, use a centrifugal blower. I've got one on top of a HEPA shop vac filter from harbor freight, some hot glue seals it up nicely to

When you need static pressure, use a centrifugal blower. I've got one on top of a HEPA shop vac filter from harbor freight, some hot glue seals it up nicely to a thin plastic sheet I cut as a size adaptor.