Test Set-up
Equipment Used: A Retrotec blower door system is installed in an exterior door frame.
Preparation: All exterior doors and windows are closed, and all interior doors are opened to ensure uniform pressure distribution throughout the house.
Test Procedure
- Fan Activation: The blower door fan is activated to pressurize the interior of the house.
- Pressure Measurement: The manometer records the pressure differential between the inside and outside of the house.
- Establishing Bias Pressure: A slight outdoor pressure reference is established by leaving a door or window open, ensuring accurate measurements.
Importance of Bias Pressure
Establishing a bias pressure is essential for:
Accurate Measurements: Ensures that the pressure differential used in the test reflects real-world conditions.
Reliable Results: Helps in obtaining consistent and reproducible test outcomes.
Compliance: Ensures the test aligns with industry standards and building codes.
This step is a foundational part of the blower door testing process and is critical for evaluating a building’s energy efficiency and airtightness.
