Assertion: boiler's control | /r/CapableOf | become popular
Facets:
value: in the quest for greater efficiency
type: PURPOSE
value: in buildings
type: LOCATION
value: very
type: DEGREE
Source sentences:
text: Controls that add burner modulation or multiple boiler staging have become very popular in the quest for greater efficiency, especially in buildings that have a highly variable load, such as those with a large number of active zones.