Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Taylor Charles H 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: 8.2 Max ACH: 16.7 Avg ACH: 11.2 eACH: 0
Filter MERV:
Percent Outside Air: 100
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 5 sqft: 491.5 cuft: 4915 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 107. ACH Copy paste check (uses total or outside) 16.7. Window opening length (inches) 52. Window opening height (inches) 4. Co2 ambient (ppm) 396. Co2 test start (ppm) 2097. Co2 test end (ppm) 962. Run time (min:sec) 4:00. Window air velocity max 735. Window air velocity min 330. Window air velocity avg 429. Window outside air volume (cfm) avg 620. Window cu-ft 1.44. Window cfm max 1062. Window cfm min 477. Window cfm avg 620. wACH max 9.9. wACH min 4.4. wACH avg 5.8. wACH Copy paste check (does not match calcultated) 16.7.

Room 104. ACH Copy paste check (uses total or outside) 11. Window opening length (inches) 52. Window opening height (inches) 4. Co2 ambient (ppm) 396. Co2 test start (ppm) 2034. Co2 test end (ppm) 1049. Run time (min:sec) 5:00. Window air velocity max 707. Window air velocity min 119. Window air velocity avg 390. Window outside air volume (cfm) avg 563. Window cu-ft 1.44. Window cfm max 1021. Window cfm min 172. Window cfm avg 563. wACH max 7.6. wACH min 1.3. wACH avg 4.2. wACH Copy paste check (does not match calcultated) 11.

Room 210. ACH Copy paste check (uses total or outside) 9.9. Window opening length (inches) 51. Window opening height (inches) 4. Co2 ambient (ppm) 428. Co2 test start (ppm) 1789. Co2 test end (ppm) 933. Run time (min:sec) 6:00. Window air velocity max 478. Window air velocity min 98. Window air velocity avg 202. Window outside air volume (cfm) avg 286. Window cu-ft 1.42. Window cfm max 677. Window cfm min 139. Window cfm avg 286. wACH max 5.0. wACH min 1.0. wACH avg 2.1. wACH Copy paste check (does not match calcultated) 9.9.

Room 201. ACH Copy paste check (uses total or outside) 8.2. Window opening length (inches) 51. Window opening height (inches) 4. Co2 ambient (ppm) 428. Co2 test start (ppm) 2095. Co2 test end (ppm) 1273. Run time (min:sec) 5:00. Window air velocity max 478. Window air velocity min 206. Window air velocity avg 289. Window outside air volume (cfm) avg 409. Window cu-ft 1.42. Window cfm max 677. Window cfm min 292. Window cfm avg 409. wACH max 4.9. wACH min 2.1. wACH avg 3.0. wACH Copy paste check (does not match calcultated) 8.2.

Room 100B. ACH Copy paste check (uses total or outside) 18. Window opening length (inches) 72. Window opening height (inches) 4. Co2 ambient (ppm) 417. Co2 test start (ppm) 2405. Co2 test end (ppm) 1516. Run time (min:sec) 2:00. Window air velocity max 833. Window air velocity min 218. Window air velocity avg 703. Window outside air volume (cfm) avg 1406. Window cu-ft 2.00. Window cfm max 1666. Window cfm min 436. Window cfm avg 1406. wACH max 20.3. wACH min 5.3. wACH avg 17.2. wACH Copy paste check (does not match calcultated) 18.

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.