Air conditioning
Khalil is ASME, AIAA and ASHRAE active fellow and is an ASHRAE distinguished lecturer on two topics; Ventilation of tombs of valley of kings and design of air conditioning systems for surgical operating theatres. The tombs include King Tutankh Amen, Ramses VII, Amhotep, Horemoheb, Ramses IV,V as well as Bay. It also includes the design of Air conditioning of the Hanging Church of Christ in Cairo.