Build this DIY Air Purifier with the only required tool being a utility knife (though optional tools make building easier). Parts are readily available and cheap. Worked well in my home to minimize smoke smell in our home. Very portable and not too loud.
Parts list and estimated costs:
• 5 gallon bucket ($3)
• 5 gallon bucket lid ($2)
• HEPA upright vacuum bag ($8)
• Ventilation fan for bathrooms ($15)
• 2 large rubber bands ($0.10)
Total estimated cost: $28.10
