The potential and effectiveness of the Hybrid Turbine Ventilator (HTV) application in actual building has been studied under Malaysian weather conditions. Tests for the ventilation performance of the device and other conventional ventilation strategies were carried out in the same room within a low-rise institutional building.Acomparison through profiles of air temperature, relative humidity and indoor air velocity has been made to investigate the efficiency of the HTV in improving indoor thermal environment. The results show that the HTV succeeded to reduce indoor air temperature and relative humidity level by 0.7°C and 1.7% respectively. It also achieved to induce air movement at the occupied level of up to average of 0.38m/s in average for a three-day study with opened windows and doors. However, the relatively high air temperature, high relative humidity and minimal air velocity which are produced by the HTV when the openings are closed show that its performance should be enhanced by its utilization for the attic ventilation provided with the battery life is sufficient enough for its all time operation.

Keywords: Stack ventilation, Turbine ventilator, Solar energy, Malaysian climate