How to make a $1.50 room air purifier to lower CO, CO2, TVOC and Formaldehyde

Get these 3 for $1.25 containers from the dollar store, use one per purifier.

Get $5, 8 lb bag of LUMP (not briquette) coal

Break the big pieces of coal into smaller ones with exposed surfaces

Cover top with duct tape or aluminium tape, leave all sides open and covered (level) with coal)

Place in front of a tiny or bigger fan.

In 15 minutes it lowers readable and verified co, co2, tvoc and formaldehyde numbers on a detector.

Note: Use air blower to clear coal dust from coals and cover coals in cut out cheap furnace filter for better cleaner filtering results

Before

12 minutes later