Additional Room Refill

Save $20 on Additional Room Filters now through June 30. Discount applied automatically at checkout — no code needed.

Test more rooms. One return shipment.

Already ordered the Standard Kit? Add as many rooms as you want to your testing session. Each Additional Room Refill gives you one more filter to run simultaneously — so you can compare your bedroom, basement, living room, or any other space side by side.

How many do I need? We recommend one filter per 1,000 sq ft or one filter per level for a full picture of your home. A 2,000 sq ft two-story home, for example, would ideally use one Additional Room Refills alongside your kit's included filter — one per floor.

When you're done, pack all your used filters into the original kit box and return everything together using the prepaid label that came with your kit. One shipment, one result per room, no extra shipping hassle. We'll make sure the fan is cleaned and reused appropriately rather than ending up in a landfill.

How it works:

1. Run each filter in a separate room for 2 hours to collect samples
2. Pack all used filters — including this refill — into your kit's return box
3. Ship everything back using the prepaid label included with your Standard Kit
4. Receive individual results for each filter, clearly labeled by room

What's included:

• One filter cartridge
• Full genomic analysis of one air sample
• Digital results report

Important: This refill does not include a return label. It is designed to ship back together with your Standard Kit using the kit's included prepaid label. If you're planning to test at a later date rather than now, order a Later Date Refill instead — it includes its own return label.