Clean Air Building Certificate

Space Type: BOS-School
Establishment Name: Mattahunt Elementary 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: 2.9 Max ACH: 7.8 Avg ACH: 4.9 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: 882 cuft: 8820 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 215. Diffuser air volume (cfm) 567. % Outside air 70. Calculated air volume (cfm) outside 397. Calculated air volume (cfm) return 170. Filter merv rating 13. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 542. ACH outside 3. ACH merv filter return air 1.1. ACH total 4.1.

Room 231. Diffuser air volume (cfm) 535. % Outside air 70. Calculated air volume (cfm) outside 374. Calculated air volume (cfm) return 160. Filter merv rating 13. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 510. ACH outside 2.8. ACH merv filter return air 0.8. ACH total 3.6.

Room 317. Diffuser air volume (cfm) 1072. % Outside air 70. Calculated air volume (cfm) outside 750. Calculated air volume (cfm) return 322. Filter merv rating 13. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 1024. ACH outside 5.7. ACH merv filter return air 2.1. ACH total 7.8.

Room 318. Diffuser air volume (cfm) 873. % Outside air 70. Calculated air volume (cfm) outside 611. Calculated air volume (cfm) return 262. Filter merv rating 13. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 834. ACH outside 4.7. ACH merv filter return air 1.7. ACH total 6.4.

Room 334. Diffuser air volume (cfm) 711. % Outside air 70. Calculated air volume (cfm) outside 498. Calculated air volume (cfm) return 213. Filter merv rating 13. Filter efficiency (decimal) 0.85. Combined air volume (cfm) 679. ACH outside 3.8. ACH merv filter return air 1.4. ACH total 5.2.

Room A304. Diffuser air volume (cfm) 740. % Outside air 100. Calculated air volume (cfm) outside 740. Calculated air volume (cfm) return 0. Filter efficiency (decimal) 0. Combined air volume (cfm) 740. ACH outside 5. ACH total 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.