Building systems, both residential and commercial, are the largest consumers of energy in most of the countries. Major portion of the energy consumed in buildings is by the heating, ventilation, and air conditioning (HVAC) systems. With increasing demand of energy in Pakistan coupled with shortfall of electricity, there is an urgent need to propose and implement new ideas, plans, and products to meet the country’s energy crisis. Single unit HVAC systems are used in both commercial and residential buildings. There is an exponential rise in the use of such HVAC systems over the past one decade that has led to shortfall in electricity especially during summer that typically spans 4-5 months in Pakistan. The strategic goal is to meet the energy challenges in Pakistan. In addition to building new power plants, there is a greater need for innovative techniques and methods to meet the energy crisis. This research endeavour proposes an innovative idea of energy conservation through the integration of high performance & high productivity computing (HP2C) tools (such as physics-based algorithms for energy budgeting, simulation, control and optimization) with microcontrollers which would use sensors/actuators, thus rendering them smart sensors and intelligent controllers, to make HVAC systems efficient. This idea can further be extended and scalable to the HVAC systems of a data centre which is a large source of electricity consumption. This, in turn, will benefit the country and serve ordinary citizens of the country in the long term.