Common signs include family members experiencing more allergies or respiratory issues when at home, dust accumulating quickly after cleaning, persistent odors that won’t clear, and HVAC systems that seem to run constantly without achieving comfortable temperatures. Nevada’s desert environment makes these problems worse because outdoor dust constantly infiltrates homes through windows, doors, and ventilation systems. If you’re cleaning surfaces frequently but still fighting dust, your ventilation system likely needs professional attention. Physical symptoms like scratchy throats, dry skin, or sleep disruption can also indicate poor indoor air quality. Since Americans spend about 90% of their time indoors, addressing these issues becomes crucial for long-term health and comfort.