Concern: Long Reach High School: November 2nd, 2018 (CXLRHS2018000089)

Room 330
Date of IEQ Report Form
Date of Report
December 18th, 2018
Students have complained yesterday 11/1 and today 11/2 of a "mildew" smell coming from the AC Unit on the side of the room. I noticed it for the first time this morning, it is subtle, but present.
IEQ Investigation Process

Identify deficiencies that may impact IEQ and/or sources of odor concerns. Typically includes the following depending on the nature of concern, but not limited to:

  • interview/questionnaire of concern individual(s)
  • inspection above drop ceiling (condition of roof deck, pipe insulation, return air plenum)
  • inspection of ventilation system (operation of variable air volume box and outdoor air dampers, check controls, measurements of carbon dioxide, temperature and relative humidity, sources near outdoor air intake, measure return and supply air volume, cleanliness of coils, liner and condensate pan)
  • inspection of exterior
  • inspection below drop ceiling (housekeeping, sink and floor drain traps, signs of past and present moisture concern via visual and/or moisture meter, mold growth, ensure connection of current and capping of abandoned sanitary vents, odorizers, excessive plants and fabric items, identify potential pathways, and measure volatile organic compounds, carbon monoxide, and lighting)

The room is serviced by a unit ventilator.

No odors or mold growth was identified.

No elevated moisture or thermal anomalies indicative of elevated moisture were detected.

The condition of the plenum was acceptable.

The condition of the unit that services the room was assessed by Building Services (HVAC). The filter was identified to be approximately 50% clogged.

The odor may have been associated with building materials and room supplies which are influenced by expected fluctuations of indoor and outdoor air temperatures and humidity levels. The unit ventilators fan operates continuously during scheduled hours of operation. The ventilation unit will not be cooling or heating if the room’s thermostat is satisfied. As a result, if the room's temperature set point is satisfied and weather outdoors is damp/humid, the ventilation will introduce unconditioned air into the space. "Musty/mold" odors are often reported under these circumstances.

The individual is encouraged to contact the Office of the Environment, should the odor return.

Corrective Actions
November 16th, 2018

The HVAC unit filter was replaced.

Tracking Number