Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Clap 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: 2.2 Max ACH: 6.5 Avg ACH: 4.1 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: 961.8 cuft: 9618 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) 6. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 433. Co2 test start (ppm) 1881. Co2 test end (ppm) 1021. Run time (min:sec) 9:00. Window air velocity max 447. Window air velocity min 282. Window air velocity avg 398. Window outside air volume (cfm) avg 409. Window cu-ft 1.03. Window cfm max 459. Window cfm min 290. Window cfm avg 409. wACH max 2.3. wACH min 1.5. wACH avg 2.1. wACH Copy paste check (does not match calcultated) 6.

Room 10. ACH Copy paste check (uses total or outside) 3.1. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 2200. Co2 test end (ppm) 1411. Run time (min:sec) 11:00. Window air velocity max 219. Window air velocity min 35. Window air velocity avg 127. Window outside air volume (cfm) avg 131. Window cu-ft 1.03. Window cfm max 225. Window cfm min 36. Window cfm avg 131. wACH max 1.1. wACH min 0.2. wACH avg 0.6. wACH Copy paste check (does not match calcultated) 3.1.

Room 9. ACH Copy paste check (uses total or outside) 2.2. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 1985. Co2 test end (ppm) 1310. Run time (min:sec) 15:00. Window air velocity max 288. Window air velocity min 24. Window air velocity avg 161. Window outside air volume (cfm) avg 165. Window cu-ft 1.03. Window cfm max 296. Window cfm min 25. Window cfm avg 165. wACH max 1.5. wACH min 0.1. wACH avg 0.8. wACH Copy paste check (does not match calcultated) 2.2.

Room 3. ACH Copy paste check (uses total or outside) 4.4. Window opening length (inches) 35. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2225. Co2 test end (ppm) 1410. Run time (min:sec) 8:00. Window air velocity max 550. Window air velocity min 151. Window air velocity avg 323. Window outside air volume (cfm) avg 314. Window cu-ft 0.97. Window cfm max 535. Window cfm min 147. Window cfm avg 314. wACH max 2.8. wACH min 0.8. wACH avg 1.6. wACH Copy paste check (does not match calcultated) 4.4.

Room 4. ACH Copy paste check (uses total or outside) 6.5. Window opening length (inches) 35. Window opening height (inches) 4. Co2 ambient (ppm) 400. Co2 test start (ppm) 2120. Co2 test end (ppm) 1310. Run time (min:sec) 6:00. Window air velocity max 595. Window air velocity min 176. Window air velocity avg 472. Window outside air volume (cfm) avg 459. Window cu-ft 0.97. Window cfm max 578. Window cfm min 171. Window cfm avg 459. wACH max 4.4. wACH min 1.3. wACH avg 3.5. wACH Copy paste check (does not match calcultated) 6.5.

Room 104. ACH Copy paste check (uses total or outside) 8.4. Window opening length (inches) 39. Window opening height (inches) 4. Co2 ambient (ppm) 446. Co2 test start (ppm) 2125. Co2 test end (ppm) 1200. Run time (min:sec) 5:41. Window air velocity max 1012. Window air velocity min 454. Window air velocity avg 725. Window outside air volume (cfm) avg 785. Window cu-ft 1.08. Window cfm max 1096. Window cfm min 492. Window cfm avg 785. wACH max 6.8. wACH min 3.1. wACH avg 4.9. wACH Copy paste check (does not match calcultated) 8.4.

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.