Washing and drying are vital unit operations in processing harvested root and tuber crops into value-added and storable products. However, traditional methods are mostly manual, laborious, and time-consuming which lead to contamination and spoilage due to their perishable nature. Thus, this study improved and evaluated a Multi-Commodity Washer and Dryer (MCWD) with water filtration system at varying washing speeds. Results showed the machine performed better when higher speeds (90 and 130 rpm) were used for sweet potato and taro while it performed better at 130 rpm using ginger. Higher feeding rate (1475.19 kg h-1) and washing capacity (152.84 kg h-1) were obtained using taro at 90 rpm. Likewise, higher washing efficiency (90.88%) and drying rate (66.44 kg h-1) were achieved using sweet potato at the highest speed (130 rpm) and lowest speed (30 rpm), respectively. The machine efficiency was greatest (92.92 %) when using ginger at 130 rpm. ANOVA revealed that aside from feeding rate and machine efficiency, varying speeds and commodities had a significant effect on the machine’s washing capacity, washing efficiency, and drying rate. Likewise, the mean rate of the water filtration system was 1.5099 m3 h-1. The machine costs Php 239,770.00 at payback period of 2.54 months.