Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Philbrick John D 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: 4.3 Max ACH: 9.8 Avg ACH: 6.9 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: 812.1 cuft: 8121 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 1. ACH Copy paste check (uses total or outside) 6. Window opening length (inches) 62. Window opening height (inches) 4. Co2 ambient (ppm) 413. Co2 test start (ppm) 2212. Co2 test end (ppm) 1400. Run time (min:sec) 6:00. Window air velocity max 123. Window air velocity min 14. Window air velocity avg 52. Window outside air volume (cfm) avg 90. Window cu-ft 1.72. Window cfm max 212. Window cfm min 24. Window cfm avg 90. wACH max 1.8. wACH min 0.2. wACH avg 0.7. wACH Copy paste check (does not match calcultated) 6.

Room 2. ACH Copy paste check (uses total or outside) 5. Window opening length (inches) 62. Window opening height (inches) 4. Co2 ambient (ppm) 413. Co2 test start (ppm) 2292. Co2 test end (ppm) 1456. Run time (min:sec) 7:00. Window air velocity max 268. Window air velocity min 38. Window air velocity avg 110. Window outside air volume (cfm) avg 189. Window cu-ft 1.72. Window cfm max 462. Window cfm min 65. Window cfm avg 189. wACH max 3.7. wACH min 0.5. wACH avg 1.5. wACH Copy paste check (does not match calcultated) 5.

Room 4. ACH Copy paste check (uses total or outside) 8.5. Window opening length (inches) 72. Window opening height (inches) 3. Co2 ambient (ppm) 416. Co2 test start (ppm) 2474. Co2 test end (ppm) 1292. Run time (min:sec) 6:00. Window air velocity max 653. Window air velocity min 305. Window air velocity avg 527. Window outside air volume (cfm) avg 791. Window cu-ft 1.50. Window cfm max 980. Window cfm min 458. Window cfm avg 791. wACH max 7.9. wACH min 3.7. wACH avg 6.4. wACH Copy paste check (does not match calcultated) 8.5.

Room 7. ACH Copy paste check (uses total or outside) 9.8. Window opening length (inches) 72. Window opening height (inches) 3. Co2 ambient (ppm) 416. Co2 test start (ppm) 2084. Co2 test end (ppm) 1152. Run time (min:sec) 5:00. Window air velocity max 1093. Window air velocity min 58. Window air velocity avg 494. Window outside air volume (cfm) avg 741. Window cu-ft 1.50. Window cfm max 1640. Window cfm min 87. Window cfm avg 741. wACH max 13.3. wACH min 0.7. wACH avg 6.0. wACH Copy paste check (does not match calcultated) 9.8.

Room 5. ACH Copy paste check (uses total or outside) 4.3. Window opening length (inches) 72. Window opening height (inches) 3. Co2 ambient (ppm) 416. Co2 test start (ppm) 2281. Co2 test end (ppm) 1466. Run time (min:sec) 8:00. Window air velocity max 539. Window air velocity min 80. Window air velocity avg 279. Window outside air volume (cfm) avg 419. Window cu-ft 1.50. Window cfm max 809. Window cfm min 120. Window cfm avg 419. wACH max 6.5. wACH min 1.0. wACH avg 3.4. wACH Copy paste check (does not match calcultated) 4.3.

Room 101. ACH Copy paste check (uses total or outside) 10.5. Window opening length (inches) 52. Window opening height (inches) 4. Co2 ambient (ppm) 396. Co2 test start (ppm) 2105. Co2 test end (ppm) 1108. Run time (min:sec) 5:00. Window air velocity max 332. Window air velocity min 220. Window air velocity avg 332. Window outside air volume (cfm) avg 480. Window cu-ft 1.44. Window cfm max 480. Window cfm min 318. Window cfm avg 480. wACH max 3.5. wACH min 2.3. wACH avg 3.5. wACH Copy paste check (does not match calcultated) 10.5.

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.