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The $99 Clean-Air Playbook: DIY Corsi-Rosenthal Boxes & Room-by-Room Fixes for Smoke, Viruses, and Allergies
Paperback
Series: Prepare for a Crisis
General Construction & Renovation
Publisher: Independently Published
Published: Aug 19 2025
Pages: 100
Weight: 0.32
Height: 0.21 Width: 6.00 Depth: 9.00
Language: English
Struggling with wildfire smoke, colds, and allergies-but not the budget for a pricey purifier? Wondering which fan + filter combo really works? Want clean air in bedrooms and classrooms tonight, not someday?
The $99 Clean-Air Playbook shows you how to build Corsi-Rosenthal (CR) boxes that punch far above their price-then size them with simple math so every room actually gets the clean air it needs. You'll learn the 5-ACH target many organizations use for smoke and viral waves, the CADR math that makes sizing foolproof, and step-by-step builds tested in real rooms. No jargon, no hype-just parts lists, pictures, and print-ready checklists you can use right away.
Build two proven CR-box designs (4-filter cube; 5-filter classic) with clear, safe steps.
Size your setup fast using the book's ACH/CADR quick formulas and tables.
Choose parts that matter: MERV-13 / ISO ePM1 filters, listed fans, shrouds, seals.
Deploy for bedrooms, classrooms, offices-where to place units for quiet, even mixing.
Maintain filters on a simple schedule (with a printable log).
Handle smoke days with a clean-room routine (recirculate, purge smart).
The playbook aligns with public guidance that targets 5 air changes per hour (ACH) of cleaner air during higher-risk periods-and shows you the CADR math to get there with DIY or store-bought options. Real classroom case studies and field tips are baked in.
Who it's for?Parents and caregivers making kids' rooms safer on a budget.
Teachers who need classroom air that's clean and calm.
Renters who can't change HVAC but can run a quiet purifier.
Allergy/asthma sufferers who want PM2.5 down where they live.
Office/classroom admins who must meet targets without breaking noise rules.
Quick-Start (2 min) - CR-Box 101 - Budget Shopping (US/UK/EU) - Build v1 & v2 - CADR & Room Coverage - Noise vs Airflow - Filter Costs & Schedules - Classrooms & Offices - Allergies & Pets - Wildfire Playbook - Maintenance & Troubleshooting - Safety - Bonus Builds - Measuring Results - Travel/Dorm Setups - Downloadable toolkit: calculators, worksheet.
Get the playbook and breathe easier tonight.Also in
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