How to choose an air purifier<br>Deep-clean your living space. If there's dust lurking in your living space, it will make your need for an air purifier seem more dire than it actually is. Vacuum regularly, including furniture, and check your heating vents for lint and dust.
If you clean regularly, you do not need to purchase an air purifier.
The text does not state that this is the case.
( z1 need :polarity - :ARG0 ( z2 you ) :ARG1 ( z3 purchase :ARG0 z2 :ARG1 ( z4 thing :ARG0-of ( z5 purify :ARG1 ( z6 air ) ) ) ) :condition ( z7 clean :ARG0 z2 :ARG1-of ( z8 regular ) ) )