Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Perkins Michael 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: 3.7 Max ACH: 10.8 Avg ACH: 5.8 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: 1138.5 cuft: 11385 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 K. ACH Copy paste check (uses total or outside) 4.7. Window opening length (inches) 42. Window opening height (inches) 4. Co2 ambient (ppm) 415. Co2 test start (ppm) 2154. Co2 test end (ppm) 2154. Run time (min:sec) 9:00. Window air velocity max 540. Window air velocity min 398. Window air velocity avg 513. Window outside air volume (cfm) avg 599. Window cu-ft 1.17. Window cfm max 630. Window cfm min 464. Window cfm avg 599. wACH max 3.5. wACH min 2.6. wACH avg 3.3. wACH Copy paste check (does not match calcultated) 4.7.

Room 101. ACH Copy paste check (uses total or outside) 10.8. Window opening length (inches) 25. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2012. Co2 test end (ppm) 1186. Run time (min:sec) 4:00. Window air velocity max 617. Window air velocity min 408. Window air velocity avg 493. Window outside air volume (cfm) avg 342. Window cu-ft 0.69. Window cfm max 428. Window cfm min 283. Window cfm avg 342. wACH max 3.2. wACH min 2.1. wACH avg 2.5. wACH Copy paste check (does not match calcultated) 10.8.

Room 105. ACH Copy paste check (uses total or outside) 3.7. Window opening length (inches) 46. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2150. Co2 test end (ppm) 1344. Run time (min:sec) 10:00. Window air velocity max 607. Window air velocity min 85. Window air velocity avg 523. Window outside air volume (cfm) avg 668. Window cu-ft 1.28. Window cfm max 776. Window cfm min 109. Window cfm avg 668. wACH max 4.2. wACH min 0.6. wACH avg 3.6. wACH Copy paste check (does not match calcultated) 3.7.

Room 201. ACH Copy paste check (uses total or outside) 6.3. Window opening length (inches) 23. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 2045. Co2 test end (ppm) 1180. Run time (min:sec) 7:00. Window air velocity max 364. Window air velocity min 202. Window air velocity avg 272. Window outside air volume (cfm) avg 174. Window cu-ft 0.64. Window cfm max 233. Window cfm min 129. Window cfm avg 174. wACH max 1.7. wACH min 0.9. wACH avg 1.2. wACH Copy paste check (does not match calcultated) 6.3.

Room 204. ACH Copy paste check (uses total or outside) 4.1. Window opening length (inches) 23. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 11999. Co2 test end (ppm) 1208. Run time (min:sec) 10:00. Window air velocity max 584. Window air velocity min 175. Window air velocity avg 337. Window outside air volume (cfm) avg 215. Window cu-ft 0.64. Window cfm max 373. Window cfm min 112. Window cfm avg 215. wACH max 2.7. wACH min 0.8. wACH avg 1.6. wACH Copy paste check (does not match calcultated) 4.1.

Room 1. ACH Copy paste check (uses total or outside) 8.8. Window opening length (inches) 52. Window opening height (inches) 4. Co2 ambient (ppm) 407. Co2 test start (ppm) 1818. Co2 test end (ppm) 1084. Run time (min:sec) 5:00. Window air velocity max 1195. Window air velocity min 659. Window air velocity avg 1023. Window outside air volume (cfm) avg 1478. Window cu-ft 1.44. Window cfm max 1726. Window cfm min 952. Window cfm avg 1478. wACH max 9.1. wACH min 5.0. wACH avg 7.8. wACH Copy paste check (does not match calcultated) 8.8.

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.