Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Otis James 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: 3.4 Max ACH: 7.5 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: 1103.7 cuft: 11037 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) 7.5. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 396. Co2 test start (ppm) 2041. Co2 test end (ppm) 999. Run time (min:sec) 8:00. Window air velocity max 819. Window air velocity min 475. Window air velocity avg 600. Window outside air volume (cfm) avg 1000. Window cu-ft 1.67. Window cfm max 1365. Window cfm min 792. Window cfm avg 1000. wACH max 9.0. wACH min 5.2. wACH avg 6.6. wACH Copy paste check (does not match calcultated) 7.5.

Room 205. ACH Copy paste check (uses total or outside) 5.8. Window opening length (inches) 69. Window opening height (inches) 4. Co2 ambient (ppm) 412. Co2 test start (ppm) 1867. Co2 test end (ppm) 1087. Run time (min:sec) 8:00. Window air velocity max 1004. Window air velocity min 254. Window air velocity avg 581. Window outside air volume (cfm) avg 1114. Window cu-ft 1.92. Window cfm max 1924. Window cfm min 487. Window cfm avg 1114. wACH max 11.4. wACH min 2.9. wACH avg 6.6. wACH Copy paste check (does not match calcultated) 5.8.

Room 201. ACH Copy paste check (uses total or outside) 4.8. Window opening length (inches) 69. Window opening height (inches) 4. Co2 ambient (ppm) 412. Co2 test start (ppm) 2024. Co2 test end (ppm) 1122. Run time (min:sec) 9:00. Window air velocity max 576. Window air velocity min 174. Window air velocity avg 424. Window outside air volume (cfm) avg 813. Window cu-ft 1.92. Window cfm max 1104. Window cfm min 334. Window cfm avg 813. wACH max 6.8. wACH min 2.1. wACH avg 5.0. wACH Copy paste check (does not match calcultated) 4.8.

Room 306. ACH Copy paste check (uses total or outside) 3.4. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2150. Co2 test end (ppm) 1330. Run time (min:sec) 11:00. Window air velocity max 286. Window air velocity min 30. Window air velocity avg 103. Window outside air volume (cfm) avg 172. Window cu-ft 1.67. Window cfm max 477. Window cfm min 50. Window cfm avg 172. wACH max 2.9. wACH min 0.3. wACH avg 1.0. wACH Copy paste check (does not match calcultated) 3.4.

Room 307A. ACH Copy paste check (uses total or outside) 6.4. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2108. Co2 test end (ppm) 1300. Run time (min:sec) 6:00. Window air velocity max 98. Window air velocity min 17. Window air velocity avg 48. Window outside air volume (cfm) avg 80. Window cu-ft 1.67. Window cfm max 163. Window cfm min 28. Window cfm avg 80. wACH max 2.3. wACH min 0.4. wACH avg 1.1. wACH Copy paste check (does not match calcultated) 6.4.

Room 1. ACH Copy paste check (uses total or outside) 5.6. Window opening length (inches) 42. Window opening height (inches) 4. Co2 ambient (ppm) 415. Co2 test start (ppm) 1900. Co2 test end (ppm) 1900. Run time (min:sec) 8:00. Window air velocity max 698. Window air velocity min 359. Window air velocity avg 544. Window outside air volume (cfm) avg 635. Window cu-ft 1.17. Window cfm max 814. Window cfm min 419. Window cfm avg 635. wACH max 4.4. wACH min 2.3. wACH avg 3.5. wACH Copy paste check (does not match calcultated) 5.6.

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.