About: http://webisa.webdatacommons.org/13205721

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	HVAC systems 1 contains other mechanical components not shown in FIG. 1 and FIG. 2 such as filters, louvers, and humidifiers, which are used for other functions such as cleaning air, ventilation, and humidification.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com