Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Hernandez Rafael 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: 3.5 Max ACH: 9.7 Avg ACH: 6.1 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: 1006 cuft: 10060 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 109. ACH Copy paste check (uses total or outside) 3.5. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 532. Co2 test start (ppm) 2087. Co2 test end (ppm) 1307. Run time (min:sec) 12:00. Window air velocity max 403. Window air velocity min 111. Window air velocity avg 277. Window outside air volume (cfm) avg 362. Window cu-ft 1.31. Window cfm max 526. Window cfm min 145. Window cfm avg 362. wACH max 3.6. wACH min 1.0. wACH avg 2.5. wACH Copy paste check (does not match calcultated) 3.5.

Room 111. ACH Copy paste check (uses total or outside) 7.1. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 420. Co2 test start (ppm) 2025. Co2 test end (ppm) 1125. Run time (min:sec) 7:00. Window air velocity max 444. Window air velocity min 197. Window air velocity avg 363. Window outside air volume (cfm) avg 474. Window cu-ft 1.31. Window cfm max 580. Window cfm min 257. Window cfm avg 474. wACH max 4.0. wACH min 1.8. wACH avg 3.2. wACH Copy paste check (does not match calcultated) 7.1.

Room 103. ACH Copy paste check (uses total or outside) 6.7. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 420. Co2 test start (ppm) 2086. Co2 test end (ppm) 1184. Run time (min:sec) 7:00. Window air velocity max 487. Window air velocity min 281. Window air velocity avg 325. Window outside air volume (cfm) avg 424. Window cu-ft 1.31. Window cfm max 636. Window cfm min 367. Window cfm avg 424. wACH max 4.3. wACH min 2.5. wACH avg 2.9. wACH Copy paste check (does not match calcultated) 6.7.

Room 211. ACH Copy paste check (uses total or outside) 4.4. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 2270. Co2 test end (ppm) 1440. Run time (min:sec) 8:00. Window air velocity max 474. Window air velocity min 1. Window air velocity avg 113. Window outside air volume (cfm) avg 148. Window cu-ft 1.31. Window cfm max 619. Window cfm min 1. Window cfm avg 148. wACH max 4.3. wACH min 0.0. wACH avg 1.0. wACH Copy paste check (does not match calcultated) 4.4.

Room 205. ACH Copy paste check (uses total or outside) 9.7. Window opening length (inches) 47. Window opening height (inches) 4. Co2 ambient (ppm) 390. Co2 test start (ppm) 2200. Co2 test end (ppm) 1336. Run time (min:sec) 4:00. Window air velocity max 374. Window air velocity min 257. Window air velocity avg 338. Window outside air volume (cfm) avg 441. Window cu-ft 1.31. Window cfm max 488. Window cfm min 336. Window cfm avg 441. wACH max 3.4. wACH min 2.3. wACH avg 3.0. wACH Copy paste check (does not match calcultated) 9.7.

Room 112. ACH Copy paste check (uses total or outside) 8.1. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2210. Co2 test end (ppm) 1340. Run time (min:sec) 5:00. Window air velocity max 731. Window air velocity min 92. Window air velocity avg 400. Window outside air volume (cfm) avg 411. Window cu-ft 1.03. Window cfm max 751. Window cfm min 95. Window cfm avg 411. wACH max 4.5. wACH min 0.6. wACH avg 2.5. wACH Copy paste check (does not match calcultated) 8.1.

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.