1622 E MARINE VIEW DR BUILDING E 2022-08-29

Riverview E I WSEC Air Barrier Testing Report i G V E D A 6 G A Executive Summary Soloveda performed air barrier testing at Riverview E in Everett,WA on 9/3/2020 in 2 separable zones. The test was performed according to ASTM E779-15 and the 2015 Washington State Energy Code (WSEC). Soloveda deployed 16 high capacity fans to 2 zones to induce a series of pressure differentials across the building envelope. Once each target pressure stabilized, airflow from each fan was measured and averaged over a minimum of ten seconds. The averaged airflows across all fans were then added together to obtain a single aggregated airflow. The relationship between airflow and differential pressure (dP) was analyzed to estimate the envelope's leakage value and then compared to the allowable limit of 0.25 CFM/ft2 at dP=75 Pa defined in 2015 WSEC Section C402.5.1.2.These values are captured in the following table. Table 1: Essential Compliance Results Summary Parameter Standard Leakage* Allowable Result Leakage per ft2 0.25 CFM/ft2 PASS Total Leakage at 75 Pa 10,098 CFM 11,708 CFM PASS *Leakages are adjusted to standard references such that results are comparable to other buildings with different test conditions. Table 2: Leakage by Building Zone Zone Leakage(SCFM) Envelope Area (sq ft) Leakage per sq ft ends 5,490 27,759 0.200 mid 4,608 19,073 0.242 • Combined Zones 10,098 46,832 0.216 Stack effect, correlation coefficients, and pressure exponents: Based upon ASTM E779-15 and the 2015 WSEC requirements,the test procedure was relative to stack effect,correlation coefficients, and pressure exponents. These are described in the following tables and figures. Equivalent leakage area (ELA): ELA is equivalent to all unintentional leaks of the building envelope combined into a single square-shaped hole given a pressure difference of 75 Pa. While the ELA has no defined limit, it is made available for an alternative interpretation of the results. This building's ELA at 75 Pa is estimated as ft2 compared to a building envelope of 46,832 ft2. Confidence intervals: To capture statistical uncertainty,each estimated value has a lower-bound and an upper- bound called a confidence interval. For example, the equivalent leakage area has a 95% confidence interval between ft2 and ft2. If we repeated this test 100 times under varying conditions,approximately 95 of the tests should have confidence intervals capturing the real value which we report as ft2. 2 112