Heat ventilation and air conditioning system course demonstrates knowledge of heating, ventilation and air conditioning principles using heating and cooling load calculations. This research aims at introducing a class project based on real world application in HVAC course. Heating loads generated by Heat Ventilation and Air Conditioning (HVAC) system in a multi-storied building was verified using heating load calculations. The total amount of heat gain and airflow (measured in Cubic Feet per Minute (CFM)) within the building was assessed to verify the working condition of the HVAC system. Fully occupied classrooms can have insufficient air flow causing discomfort for students and instructor. Heating loads and airflow rates in the building were estimated using ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) standards for winter season. The heating load calculations have some limitations due to the use of tabulated data. There are high degrees of uncertainty in input data required to determine heating loads. Much of this is due to the unpredictability of occupancy, human behavior, outdoor temperature fluctuations, variation in heat gain data for modern equipment, and introduction of new building products and HVAC equipment with unknown characteristics. These uncertainties led to the present research which compares the theoretical CFM to the measured CFM value that is collected from the measurement device. The theoretical calculations were compared to measured values which showed variation in the airflow and heating loads. The measured data was collected from the building's HVAC system to ensure the system was meeting the required demand of the load during the winter season. The theoretical and measured data shows that the heating loads and airflow within the building does not meets the building code standards for small classrooms and laboratories.