Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Grew Henry 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 Windows and Limited Univent HVAC
Min ACH: 3.3 Max ACH: 6.5 Avg ACH: 4.3 eACH: 0
Filter MERV:
Percent Outside Air: 72.3
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 6 sqft: 1036.8 cuft: 10368 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 101. % Outside air 64. Calculated air volume (cfm) outside 454. Calculated air volume (cfm) return 260. Combined air volume (cfm) 714. ACH outside 3.1. ACH merv filter return air 1.8. ACH total 4.8. ACH Copy paste check (uses total or outside) 3.1.

Room 103. % Outside air 56. Calculated air volume (cfm) outside 434. Calculated air volume (cfm) return 347. Combined air volume (cfm) 781. ACH outside 3.6. ACH merv filter return air 2.9. ACH total 6.5. ACH Copy paste check (uses total or outside) 3.6.

Room 202. % Outside air 82. Calculated air volume (cfm) outside 414. Calculated air volume (cfm) return 92. Combined air volume (cfm) 506. ACH outside 2.8. ACH merv filter return air 0.6. ACH total 3.4. ACH Copy paste check (uses total or outside) 2.8.

Room 204. % Outside air 81. Calculated air volume (cfm) outside 425. Calculated air volume (cfm) return 99. Combined air volume (cfm) 524. ACH outside 2.9. ACH merv filter return air 0.7. ACH total 3.5. ACH Copy paste check (uses total or outside) 2.8.

Room 201. % Outside air 75. Calculated air volume (cfm) outside 371. Calculated air volume (cfm) return 124. Combined air volume (cfm) 495. ACH outside 2.5. ACH merv filter return air 0.8. ACH total 3.3. ACH Copy paste check (uses total or outside) 2.5.

Room 12. % Outside air 0. Calculated air volume (cfm) outside 745. Calculated air volume (cfm) return 0. Combined air volume (cfm) 745. ACH outside 4.3. ACH merv filter return air 0.0. ACH total 4.3. ACH Copy paste check (uses total or outside) 4.3 3.9.

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.