If my school building was running the way it was supposed to be run (compliant to minimum codes), how would it rate per Harvard-CU Boulder Air Exchange Rate Target?
In other words, are we asking too much from school buildings? 🧵
@j_g_allen
In other words, are we asking too much from school buildings? 🧵
@j_g_allen
Classroom
- 500 ft2, 12 kids
- served by a central AC system
To obtain the certificate of occupancy (to be allowed to occupy the classroom), this classroom need to have minimum outside air according to building codes. This is by design and should be kept in operation.
- 500 ft2, 12 kids
- served by a central AC system
To obtain the certificate of occupancy (to be allowed to occupy the classroom), this classroom need to have minimum outside air according to building codes. This is by design and should be kept in operation.
1) The minimum outside air equal to 2.7 ACH.
2) The AC system has a filter - mainly installed to protect the heating and cooling coil - of MERV 8 (pretty common in school buildings). The filter + airflow will get you 2.67 ACH.
2) The AC system has a filter - mainly installed to protect the heating and cooling coil - of MERV 8 (pretty common in school buildings). The filter + airflow will get you 2.67 ACH.
Total outside air + MERV 8 filter will get you 5.37 ACH.
Having the minimum outside air (compliant with minimum code) + a basic filter in the AC system will get you to 5+ air exchange rate = in line with Harvard/UC Boulder recommendation.
Having the minimum outside air (compliant with minimum code) + a basic filter in the AC system will get you to 5+ air exchange rate = in line with Harvard/UC Boulder recommendation.
🚨🚨All what we are asking for is for schools to be compliant to minimum code!
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