Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Higginson Lewis
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: 5.8 Max ACH: 10.3 Avg ACH: 7 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: 1134.5 cuft: 11345 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 111. ACH Copy paste check (uses total or outside) 6.2. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2192. Co2 test end (ppm) 1378. Run time (min:sec) 6:00. Window air velocity max 725. Window air velocity min 516. Window air velocity avg 579. Window outside air volume (cfm) avg 595. Window cu-ft 1.03. Window cfm max 745. Window cfm min 530. Window cfm avg 595. wACH max 5.4. wACH min 3.8. wACH avg 4.3. wACH Copy paste check (does not match calcultated) 6.2.

Room 108. ACH Copy paste check (uses total or outside) 5.8. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2083. Co2 test end (ppm) 1260. Run time (min:sec) 7:00. Window air velocity max 782. Window air velocity min 166. Window air velocity avg 639. Window outside air volume (cfm) avg 657. Window cu-ft 1.03. Window cfm max 804. Window cfm min 171. Window cfm avg 657. wACH max 19.7. wACH min 4.2. wACH avg 16.1. wACH Copy paste check (does not match calcultated) 5.8.

Room 107. ACH Copy paste check (uses total or outside) 6.1. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2193. Co2 test end (ppm) 1367. Run time (min:sec) 6:00. Window air velocity max 733. Window air velocity min 560. Window air velocity avg 625. Window outside air volume (cfm) avg 642. Window cu-ft 1.03. Window cfm max 753. Window cfm min 576. Window cfm avg 642. wACH max 5.4. wACH min 4.1. wACH avg 4.6. wACH Copy paste check (does not match calcultated) 6.1.

Room 207. ACH Copy paste check (uses total or outside) 5.8. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2500. Co2 test end (ppm) 1463. Run time (min:sec) 7:00. Window air velocity max 767. Window air velocity min 71. Window air velocity avg 437. Window outside air volume (cfm) avg 449. Window cu-ft 1.03. Window cfm max 788. Window cfm min 73. Window cfm avg 449. wACH max 5.7. wACH min 0.5. wACH avg 3.2. wACH Copy paste check (does not match calcultated) 5.8.

Room 210B. ACH Copy paste check (uses total or outside) 10.3. Window opening length (inches) 37. Window opening height (inches) 4. Co2 ambient (ppm) 439. Co2 test start (ppm) 2170. Co2 test end (ppm) 1285. Run time (min:sec) 4:00. Window air velocity max 499. Window air velocity min 191. Window air velocity avg 325. Window outside air volume (cfm) avg 334. Window cu-ft 1.03. Window cfm max 513. Window cfm min 196. Window cfm avg 334. wACH max 7.4. wACH min 2.8. wACH avg 4.8. wACH Copy paste check (does not match calcultated) 10.3.

Room 201. ACH Copy paste check (uses total or outside) 6. Window opening length (inches) 45. Window opening height (inches) 4. Co2 ambient (ppm) 401. Co2 test start (ppm) 2010. Co2 test end (ppm) 1197. Run time (min:sec) 7:00. Window air velocity max 758. Window air velocity min 469. Window air velocity avg 511. Window outside air volume (cfm) avg 639. Window cu-ft 1.25. Window cfm max 948. Window cfm min 586. Window cfm avg 639. wACH max 5.0. wACH min 3.1. wACH avg 3.4. wACH Copy paste check (does not match calcultated) 6.

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.