Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Chittick James J 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: 2.4 Max ACH: 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: 1147.5 cuft: 11475 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 108. ACH Copy paste check (uses total or outside) 7.9. Window opening length (inches) 48. Window opening height (inches) 4. Co2 ambient (ppm) 412. Co2 test start (ppm) 2109. Co2 test end (ppm) 1087. Run time (min:sec) 7:00. Window air velocity max 453. Window air velocity min 136. Window air velocity avg 319. Window outside air volume (cfm) avg 425. Window cu-ft 1.33. Window cfm max 604. Window cfm min 181. Window cfm avg 425. wACH max 6.0. wACH min 1.8. wACH avg 4.2. wACH Copy paste check (does not match calcultated) 7.9.

Room 201. ACH Copy paste check (uses total or outside) 6.2. Window opening length (inches) 49. Window opening height (inches) 4. Co2 ambient (ppm) 360. Co2 test start (ppm) 2110. Co2 test end (ppm) 1300. Run time (min:sec) 6:00. Window air velocity max 386. Window air velocity min 11. Window air velocity avg 156. Window outside air volume (cfm) avg 212. Window cu-ft 1.36. Window cfm max 525. Window cfm min 15. Window cfm avg 212. wACH max 3.9. wACH min 0.1. wACH avg 1.6. wACH Copy paste check (does not match calcultated) 6.2.

Room 203. ACH Copy paste check (uses total or outside) 7.9. Window opening length (inches) 49. Window opening height (inches) 4. Co2 ambient (ppm) 360. Co2 test start (ppm) 2100. Co2 test end (ppm) 1260. Run time (min:sec) 5:00. Window air velocity max 356. Window air velocity min 8. Window air velocity avg 136. Window outside air volume (cfm) avg 185. Window cu-ft 1.36. Window cfm max 485. Window cfm min 11. Window cfm avg 185. wACH max 3.6. wACH min 0.1. wACH avg 1.4. wACH Copy paste check (does not match calcultated) 7.9.

Room 208. ACH Copy paste check (uses total or outside) 2.4. Window opening length (inches) 53. Window opening height (inches) 4. Co2 ambient (ppm) 539. Co2 test start (ppm) 2079. Co2 test end (ppm) 1376. Run time (min:sec) 15:00. Window air velocity max 392. Window air velocity min 32. Window air velocity avg 136. Window outside air volume (cfm) avg 200. Window cu-ft 1.47. Window cfm max 577. Window cfm min 47. Window cfm avg 200. wACH max 3.7. wACH min 0.3. wACH avg 1.3. wACH Copy paste check (does not match calcultated) 2.4.

Room 205. ACH Copy paste check (uses total or outside) 2.5. Window opening length (inches) 53. Window opening height (inches) 4. Co2 ambient (ppm) 539. Co2 test start (ppm) 1988. Co2 test end (ppm) 1323. Run time (min:sec) 15:00. Window air velocity max 318. Window air velocity min 21. Window air velocity avg 137. Window outside air volume (cfm) avg 202. Window cu-ft 1.47. Window cfm max 468. Window cfm min 31. Window cfm avg 202. wACH max 3.5. wACH min 0.2. wACH avg 1.5. wACH Copy paste check (does not match calcultated) 2.5.

Room 8. ACH Copy paste check (uses total or outside) 2.7. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2082. Co2 test end (ppm) 1312. Run time (min:sec) 14:00. Window air velocity max 484. Window air velocity min 195. Window air velocity avg 345. Window outside air volume (cfm) avg 355. Window cu-ft 1.03. Window cfm max 497. Window cfm min 200. Window cfm avg 355. wACH max 2.6. wACH min 1.0. wACH avg 1.9. wACH Copy paste check (does not match calcultated) 2.7.

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.