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Building Data Report

0. Space Type	BOS-School
1. Establishment Name	Ohrenberger William School
2. Address	address
3. City	Boston
4. State / Province	MA
5. Country	USA
6. Date	03/21/2021
7. Data Source	School District
8. Performed by	External Company
9. Company Name Address Contact	Cashins & Associates, Inc. 599 North Ave #8, Wakefield, MA 01880
10. Requirement Source	Boston School 3 ACH guideline
11. Technology	Univent Central HVAC
12. Min ACH	2.1
13. Max ACH	3.7
14. Avg ACH	2.7
15. eACH	0
16. Filter MERV
17. Percent Outside Air	60.3
18. ON and Ventilates Entire Indoor Area	Yes
19. Vent Clearance min 6 ft	Yes
20. No of Rooms	6
21. sqft	869.4
22. cuft	8694
23. No of Buildings	1
24. 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 49. Calculated air volume (cfm) outside 262. Calculated air volume (cfm) return 275. Combined air volume (cfm) 537. ACH outside 1.5. ACH merv filter return air 1.5. ACH total 3.0. ACH Copy paste check (uses total or outside) 1.4. Room 118. % Outside air 64. Calculated air volume (cfm) outside 395. Calculated air volume (cfm) return 220. Combined air volume (cfm) 615. ACH outside 1.6. ACH merv filter return air 0.9. ACH total 2.5. ACH Copy paste check (uses total or outside) 1.6. Room 214. % Outside air 66. Calculated air volume (cfm) outside 278. Calculated air volume (cfm) return 142. Combined air volume (cfm) 420. ACH outside 1.5. ACH merv filter return air 0.8. ACH total 2.3. ACH Copy paste check (uses total or outside) 1.5. Room 201. % Outside air 56. Calculated air volume (cfm) outside 225. Calculated air volume (cfm) return 175. Combined air volume (cfm) 400. ACH outside 1.2. ACH merv filter return air 0.9. ACH total 2.1. ACH Copy paste check (uses total or outside) 1.2. Room 236. % Outside air 48. Calculated air volume (cfm) outside 263. Calculated air volume (cfm) return 289. Combined air volume (cfm) 552. ACH outside 1.4. ACH merv filter return air 1.5. ACH total 2.9. ACH Copy paste check (uses total or outside) 1.4. Room 200. % Outside air 62. Calculated air volume (cfm) outside 687. Calculated air volume (cfm) return 425. Combined air volume (cfm) 1112. ACH outside 4.7. ACH merv filter return air 2.9. ACH total 7.7. ACH Copy paste check (uses total or outside) 4.7.

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