Living in Douglas presents unique air quality challenges rooted in our border-region geography and the arid climate of Southern Arizona. The combination of high-desert winds and regional agricultural activity often results in fine particulate matter and dust infiltration, which can quickly compromise indoor air quality for homeowners in historic bungalows near downtown or newer residential developments closer to the outskirts. Because our area experiences significant temperature swings between day and night, residential HVAC systems run almost constantly, meaning airborne allergens and dust are perpetually circulated throughout the home environment unless advanced filtration systems are in place.