Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Charlestown High School
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: 1.8 Max ACH: 4.1 Avg ACH: 2.8 eACH: 0
Filter MERV: ---
Percent Outside Air: 69.8
ON and Ventilates Entire Indoor Area: Yes
Vent Clearance min 6 ft: Yes
No of Rooms: 6 sqft: 1056 cuft: 10560 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 207. Diffuser air volume (cfm) 910. % Outside air 70. Calculated air volume (cfm) outside 637. Calculated air volume (cfm) return 274. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 870. ACH outside 1.9. ACH merv filter return air 0.7. ACH total 2.6. ACH Copy paste check (uses total or outside) 2.6.

Room 306. Diffuser air volume (cfm) 300. % Outside air 70. Calculated air volume (cfm) outside 210. Calculated air volume (cfm) return 90. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 287. ACH outside 1.5. ACH merv filter return air 0.55. ACH total 2.05. ACH Copy paste check (uses total or outside) 2.1.

Room 402. Diffuser air volume (cfm) 740. % Outside air 70. Calculated air volume (cfm) outside 518. Calculated air volume (cfm) return 222. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 707. ACH outside 2.7. ACH merv filter return air 1. ACH total 3.7. ACH Copy paste check (uses total or outside) 3.7.

Room 409. Diffuser air volume (cfm) 500. % Outside air 70. Calculated air volume (cfm) outside 350. Calculated air volume (cfm) return 150. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 478. ACH outside 1.3. ACH merv filter return air 0.5. ACH total 1.8. ACH Copy paste check (uses total or outside) 1.8.

Room 539. Diffuser air volume (cfm) 680. % Outside air 70. Calculated air volume (cfm) outside 476. Calculated air volume (cfm) return 204. Filter merv rating 85. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 649. ACH outside 1.9. ACH merv filter return air 0.69. ACH total 2.59. ACH Copy paste check (uses total or outside) 2.6.

Room 200. Diffuser air volume (cfm) 185. % Outside air 100. Calculated air volume (cfm) outside 185. Calculated air volume (cfm) return 0. Filter efficiency (decimal) 0. Combined air volume (cfm) 185. ACH outside 1.1. ACH total 1.1. ACH Copy paste check (uses total or outside) 1.1.

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.