An air exchanger is a device designed to improve indoor air quality by exchanging stale indoor air with fresh outdoor air. It works by drawing in outside air, filtering it, and then circulating it throughout the building while simultaneously expelling the old air. This process helps reduce pollutants, allergens, and excess humidity, creating a healthier living environment. Air exchangers are commonly used in residential and commercial buildings, especially in areas with tight insulation. They can be part of a larger heating, ventilation, and air conditioning HVAC system, ensuring that the air remains fresh and comfortable year-round while maintaining energy efficiency.