Combination of natural and mechanical ventilation is defined as a hybrid ventilation system. This system has drawn attention in indoor thermal comfort. This paper presents a CFD analysis for thermal comfort study of a residential house model. Different scenarios given to the model to evaluate the effect of the mechanical ventilation system of ceiling fan assisted the air flow and natural ventilation in indoor thermal comfort. Predictive Mean Vote (PMV) as in ASHRAE 55 and the thermal comfort (Tc) as suggested in MS 2680:2017 were calculated. From the study, it is found that there is an improvement value of PMV value by +0.1 to +0.2 by having ceiling fans as indoor assisted airflow.