Water mist technologies have the potential either to replace and overcome problems where traditional technologies have not been as effective as desired. Thus the present work aims to describe the suitability of a low pressure water mist system in suppression class (B) (PMMA) fire. The present experimental work examine and evaluate the performance of the proposed system design configurations against the conventional sprinkler system. The evaluation is performed by analyzing both visual, temperature behavior, fire extinction time and water flow rate. The experimental program includes several tests which are conducted with four different types of nozzles include the conventional one. The results of the present work showed that low pressure water mist system have notables shorter time of flame knock-down, ghost flame, suppression and extinction is with noticeable low water flux density than the conventional system.