Solar water heaters are widely used for heating water for both domestic as well as industrial purpose. In this paper, thermal efficiency performance of V-Through SWH installed at Jaipur, India for varying tilt angle and presence of dust particles on glass cover are examined. It has been found that increasing the tilt angle from 15°to 25°, average thermal efficiency of SWH increased from 27% to 30% and dust deposition reduced the thermal efficiency of SWH from 30% to 20% for fully clear glass to fully dusty glass for a constant tilt angle of 25°. © 2017 The Authors.