Engineered Systems, Feb. 2017, by John Parris Frantz.
http://www.esmagazine.com/articles/98147-a-new-spin-on-vrf-ventilation

"A Tennessee district faced an old school HVAC challenge: aging ventilators and space constraints. So this team tried a new-school variation on common VRF retrofits to deliver improved efficiency and critical IAQ: they decentralized the outdoor air, combining enthalpy wheel and VRF components within a single classroom enclosure."