RRHQ 2.0 Blower Door Test: Achieving Remarkable Efficiency
0:00 Introduction: Kyle, Randy, Jake, Chris, and Nolan collaborate to conduct a blower door test on the RRHQ 2.0 building.
0:17 The Energy Conservatory: Jake, from The Energy Conservatory, explains the history and purpose of blower door tests, highlighting their role in assessing building airtightness.
1:07 Blower Door Setup: The team sets up the blower door on the leeward side of the building for optimal test stability. The blower door is positioned to create negative pressure within the building.
3:23 Multiple Fan Usage: For large buildings like this one, multiple fans can be employed to achieve sufficient airflow (CFM) for accurate testing.
4:49 Initial Test: A preliminary test is conducted to gauge the building's airtightness, revealing a promisingly low airflow of around 550 CFM at 50 pascals of pressure.
6:48 Historical Context: The evolution of blower door testing is discussed, emphasizing its impact on identifying previously unrecognized air leakage pathways in buildings.
10:37 Tight Building Indicator: The continued rise in pressure after the fan is stopped signals a very tight building with minimal leakage.
10:54 Leak Detection Techniques: Infrared cameras and smoke pencils are presented as methods for pinpointing air leaks during a blower door test.
12:27 Leak Identification: Using a smoke pencil, the team identifies air leaks around a garage door seal and a girder truss, illustrating the test's effectiveness in revealing hidden issues.
16:27 Leakage Impact: The discussion shifts to evaluating the impact of identified leaks on overall building performance and determining the cost-effectiveness of addressing them.
18:35 Attic Pressure Test: A pressure test within the attic space indicates a near-perfect air barrier, with minimal pressure difference compared to the outside.
20:29 Code Compliance: The team notes that most building codes require three air changes per hour at 50 pascals (ACH50), significantly higher than the building's current performance.
21:36 Building Shape Advantage: The simple, rectangular shape of the building is acknowledged as a contributing factor to its airtightness.
26:29 Identifying a Significant Leak: A noticeable leak is discovered around a vent pipe, and its impact on the blower door score will be assessed.
28:47 Volume Calculation: The building's volume is calculated to be 65,386 cubic feet, a crucial factor in determining the ACH50 score.
29:47 Initial ACH50 Estimate: Based on preliminary measurements, the team estimates the building's ACH50 to be around 0.5.
31:27 Addressing the Leak: The significant leak around the vent pipe is temporarily sealed to measure its effect on the blower door reading.
33:48 Quantifying Leakage: Sealing a gap around the garage door reduces the airflow by approximately 60 CFM, highlighting the importance of addressing seemingly minor leaks.
36:22 Post-Sealing Test: After sealing the vent pipe leak, the blower door test is repeated, resulting in a revised airflow reading of 606 CFM at 50 pascals.
37:05 Updated ACH50: The new ACH50 score, after addressing the identified leaks, is calculated to be 0.52.
37:47 Performance Analysis: Despite being a large garage with multiple doors, the 0.52 ACH50 score is deemed impressive and indicative of a high-performance building.
41:28 Equivalent Leakage Area: The building's total leakage area is estimated to be equivalent to a 4.5 by 4.5-inch square, emphasizing the minimal amount of air leakage.
42:19 Conclusion: The blower door test successfully demonstrates the exceptional airtightness of the RRHQ 2.0 building, showcasing the effectiveness of meticulous air-sealing practices.
45:24 Duct Blaster Test: As an addendum, a smaller "duct blaster" fan is demonstrated, highlighting its suitability for testing smaller, highly efficient buildings.
49:50 Industry Collaboration: The collaborative nature of the building performance industry is emphasized, with professionals readily sharing knowledge and expertise.
51:02 Future Plans: The team expresses their intention to utilize the "E" ring on the blower door for future tests, signifying their commitment to achieving even higher levels of airtightness.
51:15 Final Thoughts: The video concludes by reiterating the value of blower door testing in ensuring building efficiency, comfort, and long-term cost savings.