Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Ellis Elem
Address: address
City: Boston
State / Province: MA
Country: USA
Date: 03/21/2021
Data Source: School District
Performed by: External Company
Company Name Address Contact: Cashins & Associates, Inc. 599 North Ave #8, Wakefield, MA 01880
Requirement Source: Boston School 3 ACH guideline

Technology: Natural Ventilation
Min ACH: 4.7 Max ACH: 8.7 Avg ACH: 6.6 eACH: 0
Filter MERV:
Percent Outside Air: 100
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 6 sqft: 857.8 cuft: 8578 No of Buildings: 1

Comments: Source Boston School District March 18, 2021. https://www.bostonpublicschools.org/Page/8463 . https://drive.google.com/file/d/1bzam7XeMQDjjv7Og_86PS41K78hBEOfT/view . assumed 10ft ceiling. wACH windows provided in dataset. Calculated wACH from measured CFM rates in dataset do not match. Differences due to errors. Did not use calculated wACH.

Room 113. ACH Copy paste check (uses total or outside) 7. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2001. Co2 test end (ppm) 1113. Run time (min:sec) 7:00. Window air velocity max 1139. Window air velocity min 361. Window air velocity avg 638. Window outside air volume (cfm) avg 1063. Window cu-ft 1.67. Window cfm max 1898. Window cfm min 602. Window cfm avg 1063. wACH max 14.2. wACH min 4.5. wACH avg 8.0. wACH Copy paste check (does not match calcultated) 7.

Room 102. ACH Copy paste check (uses total or outside) 5.6. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2100. Co2 test end (ppm) 1242. Run time (min:sec) 8:00. Window air velocity max 575. Window air velocity min 29. Window air velocity avg 226. Window outside air volume (cfm) avg 377. Window cu-ft 1.67. Window cfm max 958. Window cfm min 48. Window cfm avg 377. wACH max 7.2. wACH min 0.4. wACH avg 2.8. wACH Copy paste check (does not match calcultated) 5.6.

Room 108. ACH Copy paste check (uses total or outside) 4.7. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2076. Co2 test end (ppm) 1240. Run time (min:sec) 9:00. Window air velocity max 614. Window air velocity min 164. Window air velocity avg 406. Window outside air volume (cfm) avg 677. Window cu-ft 1.67. Window cfm max 1023. Window cfm min 273. Window cfm avg 677. wACH max 7.6. wACH min 2.0. wACH avg 5.0. wACH Copy paste check (does not match calcultated) 4.7.

Room 109. ACH Copy paste check (uses total or outside) 5.9. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2063. Co2 test end (ppm) 1180. Run time (min:sec) 8:00. Window air velocity max 523. Window air velocity min 73. Window air velocity avg 326. Window outside air volume (cfm) avg 543. Window cu-ft 1.67. Window cfm max 872. Window cfm min 122. Window cfm avg 543. wACH max 6.4. wACH min 0.9. wACH avg 4.0. wACH Copy paste check (does not match calcultated) 5.9.

Room 105. ACH Copy paste check (uses total or outside) 8.1. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2200. Co2 test end (ppm) 1336. Run time (min:sec) 5:00. Window air velocity max 497. Window air velocity min 270. Window air velocity avg 401. Window outside air volume (cfm) avg 668. Window cu-ft 1.67. Window cfm max 828. Window cfm min 450. Window cfm avg 668. wACH max 6.2. wACH min 3.3. wACH avg 5.0. wACH Copy paste check (does not match calcultated) 8.1.

Room 116. ACH Copy paste check (uses total or outside) 9.3. Window opening length (inches) 45. Window opening height (inches) 4. Co2 ambient (ppm) 405. Co2 test start (ppm) 2230. Co2 test end (ppm) 1390. Run time (min:sec) 4:00. Window air velocity max 905. Window air velocity min 305. Window air velocity avg 603. Window outside air volume (cfm) avg 754. Window cu-ft 1.25. Window cfm max 1131. Window cfm min 381. Window cfm avg 754. wACH max 7.9. wACH min 2.7. wACH avg 5.3. wACH Copy paste check (does not match calcultated) 9.3.

In the wake of the COVID-19 disaster many are calling for a paradigm shift in how citizens and government officials think about the quality of the air we breathe indoors. This Clean Air Certificate lets you know that those who operate this building are thinking about the air that we breathe in this building. They have disclosed the ventilation performance of this building so that we all become educated and we never have another indoor infection disaster again.