| http://www.w3.org/ns/prov#value | - HVAC systems generally are well-known, and a typical HVAC system can include, for example, components such as conduits (???ducts??? or ???duct systems???), air conditioners, compressors, heating elements, heat exchangers, filters, louvers (for controlling air flow to and from the exterior environment), blower fans, and airflow hoods.
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