Assertion: heat pump's unit | /r/CapableOf | prevent snow
Facets:
value: from blocking airflow over the coil
type: TRANSITIVE-OBJECT
Source sentences:
text: To prevent snow from blocking airflow over the coil and to permit defrost water drainage, the unit should be placed on a stand that raises it 30 to 60 cm (12 to 24 in.) above the ground.