HomeMy WebLinkAboutBlower Door TestRetrotec rCloud
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Quality Assurance Report
Single Direction Multi Point Blower Door Test
PASS Your Result: 2.67 ACH50 (1657.42 CFM50 * 60 / 37264 ft³)
Target < 3 ACH50
Test Information
Test Name 71 Vista Drive
Test Date 2025-04-03 03:09 PM (PDT)
Export id XDB2LUVL
Company Name Dexter Diagnostics
Technician Name Amanda Poindexter
Technician Email dexterdiagnostics@gmail.com
Building Information
Address 71 Vista Dr
City Glenwood Springs
State CO
Zip/postal Code 81601
Country United States
Year Constructed Not available
Elevation 7119 ft
Address Verified?Yes
Building Latitude, Longitude 39.492476, -107.288720
GPS validation Tester location not verified
Estimated Distance From Address Not available
Test Equipment
Fan Model Retrotec 5000
Fan Serial Number 5FN105365
Pressure Gauge Model Retrotec DM32X
Gauge Serial Number 502769
Environmental Conditions
Pre-test Indoor Temperature 68 °F
Pre-test Outdoor Temperature 37 °F
Wind Speed 5 MPH
Average Barometric Pressure 101 kPa
Test Dimensions
Conditioned Floor Area 3547 ft²
Volume 37264 ft³
Retrotec rCloud
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Test Results Summary
Test Type Single Direction Multi Point Blower Door Test
Flow Reference Pressure 50 Pa
Time Averaging 10 seconds
Corrected Flow 1657.42 CFM @ 50 Pa
Air Changes Per Hour 2.669
Percent Uncertainty 7.0%
Correlation, r 0.981
Intercept 67.992
Slope, n 0.816
Test Results
Test Data Set 1
Flow Direction Depressurize
Gauge Location Inside
Baseline, initial (Pa)
-4.03 -3.93 -3.79 -3.65 -3.46 -3.25 -3.04 -2.88 -2.74 -2.7
Baseline Duration 10 seconds
Average baseline -3.35 Pa
Measured Pressure (Pa)-14.76 -22.93 -29.05 -37.29
Fan Pressure [5000 - B4] (Pa)103.17
Fan Pressure [5000 - B8] (Pa)57.15 75.16 105.41
Flow (CFM)625.58 1006.53 1166.86 1400.8
Measured Pressure (Pa)-44.46 -50.94 -60.07
Fan Pressure [5000 - B4] (Pa)
Fan Pressure [5000 - B8] (Pa)128.53 150.54 184.57
Flow (CFM)1559.19 1698.12 1895.69
Baseline, final (Pa)
-0.5 -0.49 -0.49 -0.48 -0.51 -0.53 -0.55 -0.56 -0.6 -0.59
Baseline Duration 10 seconds
Average baseline -0.53 Pa
Retrotec rCloud
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Test Notes
No notes entered.
Flow Equation Parameters - Retrotec Calibrated Flow Parameters
Certificate Number:202408291152-5FN105365
Fan Last Calibrated:2024-09-11
Fan Model Retrotec 5000
Fan Serial Number 5FN105365
Fan Last Calibrated:2024-09-11
Units Used For Flow Parameters in Equation CFM
Fan pressure (FP) is the measured fan pressure when using a self-referenced fan or when the room pressure is
negative. If using a fan which is not self-referenced, and the room pressure is positive, fan pressure is calculated
by subtracting the measured room pressure from the absolute value of the fan pressure.
If PrA is greater than 0 or fan is self-referencing: FP = |PrB| - PrA
If PrA is less than 0 or fan is self-referencing: FP = PrB
Flow calculations are not valid if fan pressure is less than either MF or (K2 x |RP|)
FP = fan pressure, RP = room pressure
Range N K K1 K2 K3 K4 MF
Open 0.4990 555.2054 0.0000 0.3000 0.0000 1 10
A 0.5030 290.8751 0.0000 0.4000 0.0000 1 20
B8 0.5270 121.5413 0.0000 0.7000 0.0000 1 35
flow = (FP - RP x K1)n x (K + K3 x FP) x K4
Range A B C D F G K2 MF
B4 0.0000176573 -0.01530302 6.2742 138.42 0.59 50 0.8000 40
B2 0.0000025309 -0.00466154 2.7545 25.71 0.92 50 1.0000 50
B1 0.0000027369 -0.00313712 1.4891 10.71 0.45 50 1.0000 60
B74 0.0000007960 -0.00095010 0.5900 18.00 0.15 25 0.8000 35
B47 0.0000002690 -0.00035905 0.2435 12.05 0.09 25 1.0000 50
B29 0.0000001110 -0.00014900 0.0920 4.40 -0.02 25 0.6000 50
flow = (A x FP3) + (B x FP2) + (C x FP) + D +((G - RP) x F)
