Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Excel 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: 3.1 Max ACH: 9.3 Avg ACH: 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: 6 sqft: 1065.3 cuft: 10653 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 101. ACH Copy paste check (uses total or outside) 4.6. Window opening length (inches) 51. Window opening height (inches) 4. Co2 ambient (ppm) 405. Co2 test start (ppm) 2050. Co2 test end (ppm) 1232. Run time (min:sec) 9:00. Window air velocity max 991. Window air velocity min 519. Window air velocity avg 800. Window outside air volume (cfm) avg 1133. Window cu-ft 1.42. Window cfm max 1404. Window cfm min 735. Window cfm avg 1133. wACH max 5.9. wACH min 3.1. wACH avg 4.7. wACH Copy paste check (does not match calcultated) 4.6.

Room 212A. ACH Copy paste check (uses total or outside) 4.6. Window opening length (inches) 51. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 1984. Co2 test end (ppm) 1278. Run time (min:sec) 8:00. Window air velocity max 494. Window air velocity min 294. Window air velocity avg 421. Window outside air volume (cfm) avg 596. Window cu-ft 1.42. Window cfm max 700. Window cfm min 417. Window cfm avg 596. wACH max 5.0. wACH min 3.0. wACH avg 4.2. wACH Copy paste check (does not match calcultated) 4.6.

Room 216. ACH Copy paste check (uses total or outside) 4.8. Window opening length (inches) 45. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 2146. Co2 test end (ppm) 1411. Run time (min:sec) 7:00. Window air velocity max 611. Window air velocity min 472. Window air velocity avg 534. Window outside air volume (cfm) avg 668. Window cu-ft 1.25. Window cfm max 764. Window cfm min 590. Window cfm avg 668. wACH max 4.0. wACH min 3.1. wACH avg 3.5. wACH Copy paste check (does not match calcultated) 4.8.

Room 308. ACH Copy paste check (uses total or outside) 3.9. Window opening length (inches) 51. Window opening height (inches) 4. Co2 ambient (ppm) 438. Co2 test start (ppm) 2499. Co2 test end (ppm) 1443. Run time (min:sec) 11:00. Window air velocity max 351. Window air velocity min 75. Window air velocity avg 176. Window outside air volume (cfm) avg 247. Window cu-ft 1.42. Window cfm max 497. Window cfm min 106. Window cfm avg 249. wACH max 2.6. wACH min 0.6. wACH avg 1.3. wACH Copy paste check (does not match calcultated) 3.9.

Room 304. ACH Copy paste check (uses total or outside) 3.1. Window opening length (inches) 45. Window opening height (inches) 4. Co2 ambient (ppm) 438. Co2 test start (ppm) 2047. Co2 test end (ppm) 1218. Run time (min:sec) 14:00. Window air velocity max 433. Window air velocity min 24. Window air velocity avg 129. Window outside air volume (cfm) avg 161. Window cu-ft 1.25. Window cfm max 541. Window cfm min 30. Window cfm avg 161. wACH max 2.7. wACH min 0.1. wACH avg 0.8. wACH Copy paste check (does not match calcultated) 3.1.

Room 111. ACH Copy paste check (uses total or outside) 8. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 415. Co2 test start (ppm) 2100. Co2 test end (ppm) 1279. Run time (min:sec) 5:00. Window air velocity max 834. Window air velocity min 445. Window air velocity avg 725. Window outside air volume (cfm) avg 947. Window cu-ft 1.31. Window cfm max 1089. Window cfm min 581. Window cfm avg 947. wACH max 6.1. wACH min 3.3. wACH avg 5.3. wACH Copy paste check (does not match calcultated) 8.

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.