A vacuum with a HEPA filter is one of the best bets for ridding your home of the hair and dander shed by dogs—which for some people causes allergic reactions. HEPA stands for “high efficiency particulate air,” and tightly woven HEPA filters can keep just about all small, inhalable irritants from spewing back into the air as you vacuum—not just dander but also dust and other airborne particles. Make sure filtration efficiency is at least 99.97 percent and that the particles retained are as small as 0.3 micrometers. The label should guide you, and you can also ask the manufacturer.
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