Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Mozart Wolfgang 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: 5.9 Max ACH: 9.3 Avg ACH: 7 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: 790.3 cuft: 7903 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 100. ACH Copy paste check (uses total or outside) 6.9. Window opening length (inches) 39. Window opening height (inches) 4. Co2 ambient (ppm) 420. Co2 test start (ppm) 2066. Co2 test end (ppm) 1248. Run time (min:sec) 6:00. Window air velocity max 378. Window air velocity min 19. Window air velocity avg 181. Window outside air volume (cfm) avg 196. Window cu-ft 1.08. Window cfm max 410. Window cfm min 21. Window cfm avg 196. wACH max 3.2. wACH min 0.2. wACH avg 1.5. wACH Copy paste check (does not match calcultated) 6.9.

Room 104. ACH Copy paste check (uses total or outside) 5.9. Window opening length (inches) 51. Window opening height (inches) 4. Co2 ambient (ppm) 420. Co2 test start (ppm) 234. Co2 test end (ppm) 1421. Run time (min:sec) 6:00. Window air velocity max 336. Window air velocity min 74. Window air velocity avg 129. Window outside air volume (cfm) avg 183. Window cu-ft 1.42. Window cfm max 476. Window cfm min 105. Window cfm avg 183. wACH max 3.6. wACH min 0.8. wACH avg 1.4. wACH Copy paste check (does not match calcultated) 5.9.

Room 103. ACH Copy paste check (uses total or outside) 6.7. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 426. Co2 test start (ppm) 2009. Co2 test end (ppm) 1070. Run time (min:sec) 8:00. Window air velocity max 161. Window air velocity min 37. Window air velocity avg 85. Window outside air volume (cfm) avg 111. Window cu-ft 1.31. Window cfm max 210. Window cfm min 48. Window cfm avg 111. wACH max 1.6. wACH min 0.4. wACH avg 0.8. wACH Copy paste check (does not match calcultated) 6.7.

Room 202. ACH Copy paste check (uses total or outside) 6.9. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 426. Co2 test start (ppm) 2976. Co2 test end (ppm) 1557. Run time (min:sec) 7:00. Window air velocity max 700. Window air velocity min 96. Window air velocity avg 414. Window outside air volume (cfm) avg 541. Window cu-ft 1.31. Window cfm max 914. Window cfm min 125. Window cfm avg 541. wACH max 6.9. wACH min 1.0. wACH avg 4.1. wACH Copy paste check (does not match calcultated) 6.9.

Room 201. ACH Copy paste check (uses total or outside) 6.5. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 426. Co2 test start (ppm) 2435. Co2 test end (ppm) 1470. Run time (min:sec) 6:00. Window air velocity max 438. Window air velocity min 65. Window air velocity avg 183. Window outside air volume (cfm) avg 239. Window cu-ft 1.31. Window cfm max 572. Window cfm min 85. Window cfm avg 239. wACH max 4.3. wACH min 0.6. wACH avg 1.8. wACH Copy paste check (does not match calcultated) 6.5.

Room 108*. ACH Copy paste check (uses total or outside) 3.1. Window opening length (inches) 22. Window opening height (inches) 4. Co2 ambient (ppm) 425. Co2 test start (ppm) 2263. Co2 test end (ppm) 1467. Run time (min:sec) 11:00. Window air velocity max 492. Window air velocity min 87. Window air velocity avg 288. Window outside air volume (cfm) avg 176. Window cu-ft 0.61. Window cfm max 301. Window cfm min 53. Window cfm avg 176. wACH max 2.3. wACH min 0.4. wACH avg 1.3. wACH Copy paste check (does not match calcultated) 3.1.

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.