Proper location selection is critical. Good samples come from undisturbed dust—not recent spills or moldy corners.

Where to Sample:

• Top of door frames and moldings
• Upper shelves, dressers, and entertainment centers
• HVAC return vents
• Behind or under furniture in main living areas
• High and low spots across each floor of the home

Where NOT to Sample:

• Bathrooms, kitchens, or laundry rooms
• Areas with visible mold or water damage
• Recently cleaned or dusted surfaces
• Construction zones (e.g., drywall dust or renovation sites)
• Rusty surfaces, heaters, or high heat areas