How to make your bedroom asthma friendly<br>Vacuum your bedroom once a week. Use a vacuum that employs a hepa filter or another small-pore, multi-layered vacuum bag designed to help trap allergens. Vacuums with motorized heads are also recommended, as they are better at capturing the dust that the vacuum agitates.

Can we draw the following conclusion?
Some vacuums have motorized heads.

Choose from:
--Yes.
--It's impossible to say.
--No.
Yes