The Economic Times. Each residence comes with a private lift lobby, one apartment per core, 13-foot floor-to-floor height, three-side-open layouts, expansive wraparound decks, home automation, and an in-home air. Gurugram (Haryana) [India], November 21: Trehan Iris, a distinguished name in India's real estate landscape with a legacy of developing wellness-centric and future-forward communities, has announced.