The Ezra and Cecile Zilkha Gallery has a climate problem. “The airflow is not democratic,” said Ben Chaffee, associate director of visual arts and the curator for this fall’s exhibit by artists Renee Gladman and Nick Raffel, running through October 16. In the wing that is favored by airflow, Raffel installed a fan. In the other wing is Gladman’s collection. Her lines of prose and lines of drawing are neglected by the ventilation system. Raffel’s installation, called airfoil, explores how the aesthetics of utilities express historic understandings of energy usage. Gladman’s exhibit, called THE DREAM OF SENTENCES, is the…