An online lecture on sustainable designs of HVAC was held by the Department of Mechanical Engineering, Z.H. College of Engineering and Technology, Aligarh University. The lecture was delivered by Mr Adil Inam who is the business manager of Intercol. He started the lecture by giving a brief introduction to HVAC and explained the different simulation software used in HVAC. He also helped students in understanding the importance of the role of ASHRAE in the HVAC industry. The lecture consisted of urging students to take up the challenges related to the HVAC systems and their sustainability. The lecture was attended by 150 students from different institutes like IIT Roorkee, IIT Bombay, National Taiwan University of Science and Technology, Najran University, Pusa Insitute of Technology Delhi, Aliah University of Kolkata and many more.