Assertion: roof vent | /r/HasProperty | equivalent
Facets:
value: to airflow back-flow prevention
type: PURPOSE
value: to a 4 inch wall termination
type: OTHER
value: in regard to resistance
type: OTHER
Source sentences:
text: The roof vent or louvered plenum must be equivalent to a 4 inch wall termination in regard to resistance to airflow and back-flow prevention, and should require little or no maintenance to prevent clogging.