Solar water heater is widely utilized in Taiwan. Due to the geographical location of Taiwan, it is frequently subject to the impact of severe typhoon each year. This leads to the damage for some solar water heaters. To resolve this kind of problem, this study intend to reduce the wind loading of a commercial solar water heater. One approach is to lift the model, and the other is to install a guiding plate. It is found that the wind loading is reduced effectively with a 270-deg guiding plate, which is normal to the freestream. Higher degree of vibration is also noted as either approach.