Field Testing ASHRAE Guideline 26 2012 Guideline for

Field Testing ASHRAE Guideline 26 -2012 Guideline for Field Testing of General Ventilation Filtration Devices and Systems for Removal Efficiency In-Situ by Particle Size and Resistance to Airflow Blue Heaven Technologies, Inc. Louisville, KY www. blueheaventech. com

Who Can Do it ?

Why do In-Situ Testing? • Compare Different Products • Tests equipment under “Real World” Conditions • It’s better than just standing around • To Frustrate Others Issues with In-Situ Testing? • Hard to Duplicate Test Conditions from test to test • Easy to Manipulate Test Conditions • Who Pays for it?

Basic Sampling System

You Must Sample Isokineticly or You Will FAIL!

ISOKINETIC SAMPLING Sampling in which the flow in the sampler inlet is moving in the same direction and at the same velocity as the flow being sampled.

Sample Nozzle

ISOAXIAL SAMPLING Allows for Isokinetic Sampling by adjusting flow at the sample nozzle instead of changing the nozzle size Flow to Particle Counter Pump Flow Sample Flow Adjust Flow in this “Outer Tube” by varying the vacuum pump flow rate so the counter maintains ISOKINETIC SAMPLING.

Iso-Axial Sample Probe

Upstream Sample Locations

Downstream Sampling Location

Really, This Worked at the Office? !? !? !

Particle Counter

Example Test Data – Filter 1 Size Range (µm) 0. 3 - 0. 5 - 0. 7 - 1. 0 - 2. 0 - 5. 0 >5. 0 D 1 2354. 333 133 29 17. 66667 6. 166667 0. 666667 U 1 D 2 U 2 D 3 U 3 D 4 U/S Avg 7154. 167 5966. 833 5634 6251. 667 2449 2314. 333 2275. 167 562. 5 448. 5 399. 6667 470. 2222 128. 1667 118. 5 114. 1667 185. 1667 141. 1667 131. 5 152. 6111 29. 66667 30 27. 83333 179. 1667 138. 3333 115. 5 144. 3333 21 16. 33333 15. 5 142. 6667 108. 3333 89. 83333 113. 6111 4 2. 666667 3. 333333 12. 66667 8. 5 5. 5 8. 888889 0. 166667 0 0. 166667 Size Range (µm) 0. 3 - 0. 5 - 0. 7 - 1. 0 - 2. 0 - 5. 0 >5. 0 Eff 1 66. 43 76. 79 84. 16 89. 21 96. 44 96. 71 Efficiency Calculations (%) Eff 2 60. 08 72. 50 78. 87 86. 51 96. 92 99. 02 Eff 3 59. 27 70. 89 78. 01 86. 22 96. 66 98. 48 D/S Avg 2348. 208 123. 4583 29. 125 17. 625 4. 041667 0. 25 Average Standard 95% Upper 95% Lower Efficiency Deviation Conf. Coeff. (%) (%) 61. 93 3. 920 71. 67 52. 19 73. 39 3. 046 80. 96 65. 83 80. 35 3. 330 88. 62 72. 07 87. 31 1. 650 91. 41 83. 21 96. 67 0. 243 97. 28 96. 07 98. 07 1. 209 101. 07 95. 07 CV (%) 6. 33 4. 15 4. 14 1. 89 0. 25 1. 23

In-Situ Filter Comparison 120 Efficiency (%) 100 80 60 Filter 1 40 Filter 2 20 0 0. 1 1 Particle Size (µm) 10

Air Entry to Building

Entry House Access

Pre-filter Bank Upstream

Downstream of Pre-Filters

Velocity Traverse Ports