Rialto IAQ work covers tract-home pollen and allergen management, wildfire smoke recovery (the city is downwind of San Bernardino mountain fire zones), and Foothill Boulevard light commercial IAQ for restaurants, retail, and small offices. Pre-1980 central Rialto homes often have decades of accumulated duct dust addressed via combined HEPA-cabinet duct cleaning + 4-inch MERV 13 media filter cabinet. Newer North Rialto subdivisions run standard IAQ work — filter cabinet upgrade + UV-C lamp common. Restaurant IAQ on Foothill Blvd requires commercial-grade equipment for kitchen exhaust make-up air interaction with the dining-room HVAC.