Final answer:
Mechanical systems using 100% outside air are used to ensure indoor air quality by removing contaminants. It involves the use of electrostatic precipitators and regular maintenance like changing filters.
Step-by-step explanation:
The operation of mechanical systems that use 100% outside air, often referred to as 'make-up air,' is an engineering control strategy to remove contaminants from indoor environments. This process is typically conducted after construction and before occupants move in, ensuring air quality is high and devoid of pollutants, irritants, and allergens. Such measures are critical, especially in light of concerns about indoor air quality and potential infections.
Electrostatic precipitators, in conjunction with a home or building's heating and air conditioning system, can be very effective in removing polluting particles. Routine maintenance, such as changing or cleaning filters regularly, is necessary to keep these systems functioning properly. Additionally, proper sealing and insulation of a building contribute to controlling the air exchange rate, which is a balance between the need to remove indoor pollutants and conserving energy.
Overall, the main goals of these processes are to supply sufficient oxygen for breathing, moderate indoor pollutant levels, and maintain comfortable temperature and humidity levels within a structure.