Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Perry Oliver Hazard K 8
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: 4.6 Max ACH: 9.4 Avg ACH: 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: 499.6 cuft: 4996 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 5. ACH Copy paste check (uses total or outside) 8.2. Window opening length (inches) 52. Window opening height (inches) 4. Co2 ambient (ppm) 407. Co2 test start (ppm) 1821. Co2 test end (ppm) 1033. Run time (min:sec) 6:00. Window air velocity max 1627. Window air velocity min 843. Window air velocity avg 1402. Window outside air volume (cfm) avg 2025. Window cu-ft 1.44. Window cfm max 2350. Window cfm min 1218. Window cfm avg 2025. wACH max 12.0. wACH min 6.2. wACH avg 10.4. wACH Copy paste check (does not match calcultated) 8.2.

Room 2. ACH Copy paste check (uses total or outside) 4.6. Window opening length (inches) 54. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 2120. Co2 test end (ppm) 1255. Run time (min:sec) 9:00. Window air velocity max 979. Window air velocity min 173. Window air velocity avg 691. Window outside air volume (cfm) avg 1027. Window cu-ft 1.50. Window cfm max 1469. Window cfm min 260. Window cfm avg 1037. wACH max 6.5. wACH min 1.1. wACH avg 4.6. wACH Copy paste check (does not match calcultated) 4.6.

Room 10. ACH Copy paste check (uses total or outside) 8.7. Window opening length (inches) 54. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 2011. Co2 test end (ppm) 1070. Run time (min:sec) 6:00. Window air velocity max 1703. Window air velocity min 581. Window air velocity avg 1252. Window outside air volume (cfm) avg 1861. Window cu-ft 1.50. Window cfm max 2555. Window cfm min 872. Window cfm avg 1878. wACH max 12.6. wACH min 4.3. wACH avg 9.3. wACH Copy paste check (does not match calcultated) 8.7.

Room 14. ACH Copy paste check (uses total or outside) 9.4. Window opening length (inches) 53. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2220. Co2 test end (ppm) 1382. Run time (min:sec) 5:00. Window air velocity max 1249. Window air velocity min 80. Window air velocity avg 684. Window outside air volume (cfm) avg 1007. Window cu-ft 1.47. Window cfm max 1839. Window cfm min 118. Window cfm avg 1007. wACH max 9.5. wACH min 0.6. wACH avg 5.2. wACH Copy paste check (does not match calcultated) 9.4.

Room 13. ACH Copy paste check (uses total or outside) 8.5. Window opening length (inches) 53. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2008. Co2 test end (ppm) 1189. Run time (min:sec) 5:00. Window air velocity max 1574. Window air velocity min 250. Window air velocity avg 936. Window outside air volume (cfm) avg 1378. Window cu-ft 1.47. Window cfm max 2317. Window cfm min 368. Window cfm avg 1378. wACH max 12.4. wACH min 2.0. wACH avg 7.4. wACH Copy paste check (does not match calcultated) 8.5.

Room 1. ACH Copy paste check (uses total or outside) 8.2. Window opening length (inches) 62. Window opening height (inches) 4. Co2 ambient (ppm) 413. Co2 test start (ppm) 2342. Co2 test end (ppm) 1530. Run time (min:sec) 4:00. Window air velocity max 209. Window air velocity min 9. Window air velocity avg 89. Window outside air volume (cfm) avg 153. Window cu-ft 1.72. Window cfm max 360. Window cfm min 16. Window cfm avg 153. wACH max 4.3. wACH min 0.2. wACH avg 1.8. wACH Copy paste check (does not match calcultated) 8.2.

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.