Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Boston Collaborative H S
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: 5.5 Max ACH: 15.7 Avg ACH: 7.8 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: 643.3 cuft: 6433 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 2. ACH Copy paste check (uses total or outside) 5.9. Window opening length (inches) 46. Window opening height (inches) 4. Co2 ambient (ppm) 425. Co2 test start (ppm) 2015. Co2 test end (ppm) 1220. Run time (min:sec) 7:00. Window air velocity max 1196. Window air velocity min 287. Window air velocity avg 687. Window outside air volume (cfm) avg 878. Window cu-ft 1.28. Window cfm max 1528. Window cfm min 367. Window cfm avg 878. wACH max 7.5. wACH min 1.8. wACH avg 4.3. wACH Copy paste check (does not match calcultated) 5.9.

Room 7. ACH Copy paste check (uses total or outside) 5.8. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2230. Co2 test end (ppm) 1420. Run time (min:sec) 6:00. Window air velocity max 769. Window air velocity min 160. Window air velocity avg 531. Window outside air volume (cfm) avg 531. Window cu-ft 1.00. Window cfm max 769. Window cfm min 160. Window cfm avg 531. wACH max 4.7. wACH min 1.0. wACH avg 3.2. wACH Copy paste check (does not match calcultated) 5.8.

Room 4. ACH Copy paste check (uses total or outside) 6.7. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2300. Co2 test end (ppm) 1485. Run time (min:sec) 5:00. Window air velocity max 1168. Window air velocity min 503. Window air velocity avg 794. Window outside air volume (cfm) avg 794. Window cu-ft 1.00. Window cfm max 1168. Window cfm min 503. Window cfm avg 794. wACH max 9.4. wACH min 4.0. wACH avg 6.4. wACH Copy paste check (does not match calcultated) 6.7.

Room 1st office tchr lnge. ACH Copy paste check (uses total or outside) 15.7. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 398. Co2 test start (ppm) 2165. Co2 test end (ppm) 1204. Run time (min:sec) 3:00. Window air velocity max 914. Window air velocity min 298. Window air velocity avg 629. Window outside air volume (cfm) avg 629. Window cu-ft 1.00. Window cfm max 914. Window cfm min 298. Window cfm avg 629. wACH max 22.5. wACH min 7.3. wACH avg 15.5. wACH Copy paste check (does not match calcultated) 15.7.

Room Conf. Room. ACH Copy paste check (uses total or outside) 7.5. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 398. Co2 test start (ppm) 2250. Co2 test end (ppm) 1388. Run time (min:sec) 5:00. Window air velocity max 973. Window air velocity min 444. Window air velocity avg 729. Window outside air volume (cfm) avg 729. Window cu-ft 1.00. Window cfm max 973. Window cfm min 444. Window cfm avg 729. wACH max 10.8. wACH min 4.9. wACH avg 8.1. wACH Copy paste check (does not match calcultated) 7.5.

Room 121. ACH Copy paste check (uses total or outside) 9.6. Window opening length (inches) 49. Window opening height (inches) 4. Co2 ambient (ppm) 424. Co2 test start (ppm) 2026. Co2 test end (ppm) 1144. Run time (min:sec) 5:00. Window air velocity max 488. Window air velocity min 39. Window air velocity avg 355. Window outside air volume (cfm) avg 483. Window cu-ft 1.36. Window cfm max 664. Window cfm min 53. Window cfm avg 483. wACH max 6.2. wACH min 0.5. wACH avg 4.5. wACH Copy paste check (does not match calcultated) 9.6.

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.