Assertion: hepa filter | /r/HasProperty | pleated like true hepa filter
Facets:
value: in order to increase its surface area
type: PURPOSE
Source sentences:
text: A "HEPA-like" filter is pleated like a true HEPA filter in order to increase its surface area, which reduces air resistance and makes it possible for the higher-efficiency filter to be used without upgrading the HVAC system.