In the present work, the performance of a small reverse osmosis RO (house scale) desalination unit is experimentally investigated. The parameters such as salinity of the feed water (2000-3000 ppm), and feed water temperature (29oC - 41oC), at feed flow rate of (1.5 L/min) are considered. The results demonstrate that, increase in feed temperature from 29oC to 41oC leads to an increase in the permeate salinity while feed pressure and salt rejection ratio percent decrease by about 4% and 6%, respectively. However, there is an insignificant change in the recovery ratio percent and permeate flow rate with the increase of feed temperature. Also the results illustrate that the increase in feed water salinity leads to an increase of permeate salinity while permeate flow rate and recovery ratio percent decreases.