
7 steps to create a DIY positive pressure room
Facts Sheet:
- Setup: Under 30 minutes, costing less than 1,500 baht, a fraction compared to factory-made OAU air purifiers (10,000-25,000 baht) excluding ongoing filter expenses.
- Filter lifespan: About 3 weeks in tests with 16 hours daily use in AQI conditions above 120; extending it is possible by wrapping a Hepa sheet (around 20 Baht online) around the filter.
- Monthly electricity cost: 240 Baht (24/7 operation at 8 Baht per day).

