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This chapter presents the statement of the problem, background of the study, significance of the study and scope of limitations. Background of the Study The presence in atmospheric environment of natural and artificial substance affect human or well-being. Smoke is very dangerous for all. It principally injures the respiratory system and health effects. Since most people spend most of the time indoors, there has been increase interest in smoke concentration in homes, workplace and shopping areas. And because of this, the researcher wants to neutralize or lessen the smoke odor from these places. Also to avoid occurrence of allergies and lessen pollutants such as mold, dust, smoke, and fungi.

Statement of the Problem This study was conducted to answer the following questions: 1. What is the perception of student using “AC-DC Air Cleaner/Smoke Odor Neutralizer” with regards to the device’s: 1.1.	Usefulness 1.2.	Maintenance 1.3.	Functionality 2. What is the perception of laborer using “AC-DC Air Cleaner/Smoke Odor Neutralizer” with regards to the   device’s: 2.1. Usefulness 2.2. Maintenance 2.3 Functionality 3.Is there any significant difference between the perceptions of student using AC-DC Air Cleaner/Smoke Odor Neutralizer and laborer using AC-DC Air Cleaner/Smoke Odor Neutralizer with regards to the device’s: 3.1. Usefulness 3.2. Maintenance 3.3 Functionality www.nelowap.wen.ru@nelo.html