Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: McCormack John W Middle
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: 3.2 Max ACH: 4.4 Avg ACH: 3.9 eACH: 0
Filter MERV:
Percent Outside Air: 81
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 6 sqft: 825 cuft: 8250 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 134. % Outside air 81. Calculated air volume (cfm) outside 310. Calculated air volume (cfm) return 75. Combined air volume (cfm) 385. ACH outside 2.6. ACH merv filter return air 0.6. ACH total 3.2. ACH Copy paste check (uses total or outside) 2.6.

Room 135. % Outside air 87. Calculated air volume (cfm) outside 501. Calculated air volume (cfm) return 74. Combined air volume (cfm) 575. ACH outside 3.3. ACH merv filter return air 0.5. ACH total 3.8. ACH Copy paste check (uses total or outside) 3.3.

Room 243. % Outside air 79. Calculated air volume (cfm) outside 453. Calculated air volume (cfm) return 122. Combined air volume (cfm) 575. ACH outside 3.5. ACH merv filter return air 0.9. ACH total 4.4. ACH Copy paste check (uses total or outside) 3.5.

Room 238. % Outside air 74. Calculated air volume (cfm) outside 453. Calculated air volume (cfm) return 162. Combined air volume (cfm) 615. ACH outside 2.7. ACH merv filter return air 1.0. ACH total 3.7. ACH Copy paste check (uses total or outside) 2.7.

Room 229. % Outside air 85. Calculated air volume (cfm) outside 564. Calculated air volume (cfm) return 102. Combined air volume (cfm) 666. ACH outside 3.4. ACH merv filter return air 0.6. ACH total 4.0. ACH Copy paste check (uses total or outside) 3.4.

Room 103. % Outside air 74. Calculated air volume (cfm) outside 549. Calculated air volume (cfm) return 191. Combined air volume (cfm) 740. ACH outside 4.0. ACH merv filter return air 1.4. ACH total 5.4. ACH Copy paste check (uses total or outside) 4.

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.