2020 ASHRAE TECHNOLOGY AWARD CASE STUDIES High-Performance Systems Help Preserve History Leading-edge technologies used in this museum project include frictionless centrifugal chillers, a modular heat-recovery chiller, fan-array air-handling systems, polarized filtration systems and advanced building automation system measurements and controls. BY LEIGHTON W. DEER, P.E., HBDP, MEMBER ASHRAE 30 ASHRAE JOURNAL ashrae.org J U N E 2020https://www.ashrae.org/ http://www.ashrae.org