Assertion: building's system | /r/CapableOf | consume around 20% of the total budget
Facets:
value: often
type: TEMPORAL
Source sentences:
text: These systems have grown in complexity and importance (often consuming around 20% of the total budget in commercial buildings) as occupants demand tighter control of conditions, buildings become larger, and enclosures and passive measures became less important as a means of providing comfort.