The present study was undertaken to establish the effect of wood dust on the respiratory health status of carpenters by measuring their peak expiratory flow rate (PEFR) values. Cases consisted of 150 non-smoking carpenters who were in age group of 18-45 years, while 150 non -smoking persons who were engaged in works other than carpentry served as controls. The observations were analysed statistically. Comparison of PEFR in study and control subjects was done and data was collected. Also influence of age, height, weight, body surface area and duration of exposure on PEFR of carpenters was studied. Prediction equations were formulated to determine PEFR.