Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Blackstone Elementary
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: Central HVAC
Min ACH: 7.6 Max ACH: 41.9 Avg ACH: 23.2 eACH: 0
Filter MERV: ---
Percent Outside Air: 69.5
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 6 sqft: 625 cuft: 6250 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 A41. Diffuser air volume (cfm) 2206. % Outside air 70. Calculated air volume (cfm) outside 1544. Calculated air volume (cfm) return 662. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 2107. ACH outside 13.3. ACH merv filter return air 4.8. ACH total 18.1. ACH Copy paste check (uses total or outside) 18.1.

Room A47. Diffuser air volume (cfm) 1869. % Outside air 70. Calculated air volume (cfm) outside 1308. Calculated air volume (cfm) return 561. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 1785. ACH outside 9.3. ACH merv filter return air 3.4. ACH total 12.7. ACH Copy paste check (uses total or outside) 12.7.

Room B11. Diffuser air volume (cfm) 4290. % Outside air 70. Calculated air volume (cfm) outside 3003. Calculated air volume (cfm) return 1287. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 4097. ACH outside 21.7. ACH merv filter return air 7.9. ACH total 29.6. ACH Copy paste check (uses total or outside) 29.6.

Room A24. Diffuser air volume (cfm) 4426. % Outside air 70. Calculated air volume (cfm) outside 3098. Calculated air volume (cfm) return 1318. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 4218. ACH outside 30.7. ACH merv filter return air 11.2. ACH total 41.9. ACH Copy paste check (uses total or outside) 41.9.

Room B15. Diffuser air volume (cfm) 926. % Outside air 70. Calculated air volume (cfm) outside 648. Calculated air volume (cfm) return 278. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 884. ACH outside 5.6. ACH merv filter return air 2. ACH total 7.6. ACH Copy paste check (uses total or outside) 7.6.

Room B34. Diffuser air volume (cfm) 3901. % Outside air 70. Calculated air volume (cfm) outside 2731. Calculated air volume (cfm) return 1170. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 3726. ACH outside 21.6. ACH merv filter return air 7.9. ACH total 29.5. ACH Copy paste check (uses total or outside) 29.5.

Room A003. Diffuser air volume (cfm) 1065. % Outside air 100. Calculated air volume (cfm) outside 1065. Calculated air volume (cfm) return 0. Filter efficiency (decimal) 0. Combined air volume (cfm) 1065. ACH outside 10.2. ACH total 10.2. ACH Copy paste check (uses total or outside) 10.2.

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.