Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: King ML Jr 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: 1.8 Max ACH: 7.1 Avg ACH: 4.8 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: 769.4 cuft: 7694 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 301. ACH Copy paste check (uses total or outside) 1.8. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 415. Co2 test start (ppm) 2270. Co2 test end (ppm) 1600. Run time (min:sec) 15:00. Window air velocity max 493. Window air velocity min 20. Window air velocity avg 133. Window outside air volume (cfm) avg 133. Window cu-ft 1.00. Window cfm max 493. Window cfm min 20. Window cfm avg 133. wACH max 3.7. wACH min 0.1. wACH avg 1.0. wACH Copy paste check (does not match calcultated) 1.8.

Room 309. ACH Copy paste check (uses total or outside) 7.1. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 422. Co2 test start (ppm) 2030. Co2 test end (ppm) 1213. Run time (min:sec) 6:00. Window air velocity max 640. Window air velocity min 46. Window air velocity avg 349. Window outside air volume (cfm) avg 349. Window cu-ft 1.00. Window cfm max 640. Window cfm min 46. Window cfm avg 349. wACH max 5.0. wACH min 0.4. wACH avg 2.7. wACH Copy paste check (does not match calcultated) 7.1.

Room 306. ACH Copy paste check (uses total or outside) 6.7. Window opening length (inches) 36. Window opening height (inches) 4. Co2 ambient (ppm) 422. Co2 test start (ppm) 2502. Co2 test end (ppm) 1612. Run time (min:sec) 5:00. Window air velocity max 555. Window air velocity min 218. Window air velocity avg 382. Window outside air volume (cfm) avg 382. Window cu-ft 1.00. Window cfm max 555. Window cfm min 218. Window cfm avg 382. wACH max 4.0. wACH min 1.6. wACH avg 2.8. wACH Copy paste check (does not match calcultated) 6.7.

Room 325. ACH Copy paste check (uses total or outside) 4.1. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 420. Co2 test start (ppm) 1873. Co2 test end (ppm) 1055. Run time (min:sec) 12:00. Window air velocity max 353. Window air velocity min 57. Window air velocity avg 184. Window outside air volume (cfm) avg 189. Window cu-ft 1.03. Window cfm max 363. Window cfm min 59. Window cfm avg 189. wACH max 3.0. wACH min 0.5. wACH avg 1.6. wACH Copy paste check (does not match calcultated) 4.1.

Room 321. ACH Copy paste check (uses total or outside) 3.4. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 420. Co2 test start (ppm) 2094. Co2 test end (ppm) 1322. Run time (min:sec) 11:00. Window air velocity max 364. Window air velocity min 40. Window air velocity avg 187. Window outside air volume (cfm) avg 192. Window cu-ft 1.03. Window cfm max 374. Window cfm min 41. Window cfm avg 192. wACH max 3.0. wACH min 0.3. wACH avg 1.6. wACH Copy paste check (does not match calcultated) 3.4.

Room 105. ACH Copy paste check (uses total or outside) 7. Window opening length (inches) 60. Window opening height (inches) 4. Co2 ambient (ppm) 409. Co2 test start (ppm) 2097. Co2 test end (ppm) 1152. Run time (min:sec) 7:00. Window air velocity max 580. Window air velocity min 159. Window air velocity avg 333. Window outside air volume (cfm) avg 555. Window cu-ft 1.67. Window cfm max 967. Window cfm min 265. Window cfm avg 555. wACH max 7.5. wACH min 2.1. wACH avg 4.3. wACH Copy paste check (does not match calcultated) 7.

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.