Initial DIY Cleanroom Experimentation
2 days ago
- The author tested a HEPA air purifier (AirFanta 3Pro) to measure its ability to pressurize a room, achieving 83 Pa in a sealed bag setup.
- Pressurizing a leaky old house with the purifier through a doorway was challenging due to air leaks and tape usage, and no calibration measurement was taken.
- A 13x13 inch hole was cut in a wall to mount the purifier horizontally, requiring baling wire and tape to stabilize it, resulting in a measured 12 Pa pressure delta.
- The pressure sensor's 5 Pa accuracy limits reliability; a DIY project with an SDP810-500PA sensor and Arduino is planned for finer measurements.
- The required pressure delta depends on leak types (e.g., wall cavity vs. direct outside), and methods like thermal imaging or negative pressure tests are suggested but not yet executed.
- Realistic smoke tests were inconclusive due to low particle levels indoors, and extensive testing is deferred pending better equipment.