Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: TechBoston Acad
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: 7.4 Max ACH: 20 Avg ACH: 12.5 eACH: 0
Filter MERV:
Percent Outside Air: 100
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 7 sqft: 784.2 cuft: 7842 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 100B*. ACH Copy paste check (uses total or outside) 18.1. Window opening length (inches) 72. Window opening height (inches) 4. Co2 ambient (ppm) 417. Co2 test start (ppm) 2003. Co2 test end (ppm) 1286. Run time (min:sec) 2:00. Window air velocity max 743. Window air velocity min 157. Window air velocity avg 844. Window outside air volume (cfm) avg 1688. Window cu-ft 2.00. Window cfm max 1486. Window cfm min 314. Window cfm avg 1688. wACH max 18.1. wACH min 3.8. wACH avg 20.6. wACH Copy paste check (does not match calcultated) 18.1.

Room 105. ACH Copy paste check (uses total or outside) 7.9. Window opening length (inches) 72. Window opening height (inches) 4. Co2 ambient (ppm) 417. Co2 test start (ppm) 2083. Co2 test end (ppm) 1278. Run time (min:sec) 5:00. Window air velocity max 660. Window air velocity min 73. Window air velocity avg 375. Window outside air volume (cfm) avg 750. Window cu-ft 2.00. Window cfm max 1320. Window cfm min 146. Window cfm avg 750. wACH max 8.6. wACH min 0.9. wACH avg 4.9. wACH Copy paste check (does not match calcultated) 7.9.

Room 116. ACH Copy paste check (uses total or outside) 7.8. Window opening length (inches) 72. Window opening height (inches) 4. Co2 ambient (ppm) 417. Co2 test start (ppm) 2117. Co2 test end (ppm) 1305. Run time (min:sec) 5:00. Window air velocity max 611. Window air velocity min 66. Window air velocity avg 366. Window outside air volume (cfm) avg 732. Window cu-ft 2.00. Window cfm max 1222. Window cfm min 132. Window cfm avg 732. wACH max 7.7. wACH min 0.8. wACH avg 4.6. wACH Copy paste check (does not match calcultated) 7.8.

Room 204. ACH Copy paste check (uses total or outside) 7.4. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2106. Co2 test end (ppm) 1210. Run time (min:sec) 6:00. Window air velocity max 596. Window air velocity min 135. Window air velocity avg 332. Window outside air volume (cfm) avg 553. Window cu-ft 1.67. Window cfm max 993. Window cfm min 225. Window cfm avg 553. wACH max 6.7. wACH min 1.5. wACH avg 3.7. wACH Copy paste check (does not match calcultated) 7.4.

Room 207. ACH Copy paste check (uses total or outside) 20. Window opening length (inches) 72. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2193. Co2 test end (ppm) 1040. Run time (min:sec) 3:00. Window air velocity max 656. Window air velocity min 45. Window air velocity avg 357. Window outside air volume (cfm) avg 714. Window cu-ft 2.00. Window cfm max 1312. Window cfm min 90. Window cfm avg 714. wACH max 19.4. wACH min 1.3. wACH avg 10.6. wACH Copy paste check (does not match calcultated) 20.

Room 319. ACH Copy paste check (uses total or outside) 9. Window opening length (inches) 72. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2059. Co2 test end (ppm) 980. Run time (min:sec) 7:00. Window air velocity max 989. Window air velocity min 65. Window air velocity avg 506. Window outside air volume (cfm) avg 1012. Window cu-ft 2.00. Window cfm max 1978. Window cfm min 130. Window cfm avg 1012. wACH max 13.2. wACH min 0.9. wACH avg 6.7. wACH Copy paste check (does not match calcultated) 9.

Room 215. ACH Copy paste check (uses total or outside) 6.6. Window opening length (inches) 62. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2009. Co2 test end (ppm) 1247. Run time (min:sec) 6:00. Window air velocity max 433. Window air velocity min 63. Window air velocity avg 255. Window outside air volume (cfm) avg 439. Window cu-ft 1.72. Window cfm max 746. Window cfm min 109. Window cfm avg 439. wACH max 5.7. wACH min 0.8. wACH avg 3.4. wACH Copy paste check (does not match calcultated) 6.6.

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.