Indoor Environmental Quality HVAC Assessment of Clemens Crossing Elementary School: October 3rd, 2022 (HXCCES202200009C)

Assessor
Hummy Khan
Date
Outdoor Temperature
45°F
Relative Humidity
87%
Outdoor Dew Point
41°F

Air Handling Unit (Assess representative sample of RTU/AHU, including Portables)

Unit
Check OK Comments
Tag Number
Displayed
Yes
Status
Running
Yes
Work Order Closed by Building Maintenance
RTU-7- Air conditioning appeared to be running while the outside temperature was 45 deg. All other units appeared to be in the right mode of operation (heating). Notified the HVAC department of this finding via email.
Outdoor Air Intake and Outdoor Air Dampers
Check OK Comments
Outdoor Pollution
Free from pollution sources w/i 25 ft. (e.g. dumpster, chimney, etc.)
Yes
Louvers and Access Doors
Operating properly
Yes
Work Order Closed by Building Maintenance
RTU-5- Latch on access door to mixing plenum broken.
Deflectors & Screens
Present
Yes
No debris
Yes
Dampers
Outside air damper: no obstructions
Yes
Work Order Closed by Building Maintenance
Inconsistency on the position of the outside air dampers (OADs) from one unit to the other. On some units OADs appear to be 100% open and on some units100% closed while on others partially open. For example, RTU-2, RTU-4, RTU-6, RTU-8 and RTU-9: OADs 100% open and for RTU-3: OADs 100% closed.
Return air damper: no obstructions
Yes
Mixing Plenum
Check OK Comments
Clean
No excess dirt, not used for storage
Yes
Work Order Closed by Building Maintenance
All rooftop units - Mixing plenum very dirty and should be thoroughly cleaned.
Insulation
Secure and Clean
Yes
P-Trap (if present)
Charged with liquid
Yes
Filters and Coils
Check OK Comments
Filters
Free of any bypassing
Yes
Correct size
Yes
Free from excessive loading, dampness or odor
Yes
Not collapsed/not fallen off
Yes
Present (not missing)
Yes
Date and initials written
Yes
Work Order Closed by Building Maintenance
In most units pre-filters have no dates and/or initials. AAON-RTU-2 - One filter dated March 2022 and another filter dated July 2021.
Heating Coils
Clean, no noticeable leaks, or obstructions
Yes
Cooling Coils
Clean, no noticeable leaks, or obstructions
Yes
Access: Free of any obstructions in area that may affect access
Yes
Condensation: No excess condensation problems
Yes
Blowoff: Free of water from coil blowoff
Yes
Condensate Pan and Drain Line
No visible bacterial or fungal growth
Yes
Clean, no residue, no standing water
Yes
No Overflow, leakage, blockage, or damage
Yes
Proper slope, drain line ok, drainage acceptable, discharge okay
Yes
Fans and Motors
Check OK Comments
Condition
Operational
Yes
No unusual odors, noise, or vibration
Yes
Work Order Closed by Building Maintenance
Exhaust fan (EF-2) - Excessive noise.
Central Plant
Check OK Comments
Heating Central Plant
Boiler operational
Yes
Portable(s)
Check OK Comments
Thermostat
Thermostat setting acceptable
Yes
Work Order Closed by Building Maintenance
Portable 175- Thermostat was set in the wrong mode of operation "cool" when it should have been in the "auto" mode. This was corrected while on site and the Building Maintenance was notified of this and to follow up and ensure proper operation.
Thermostat cover
Yes
Fan Mode Correct
Yes
Space Temperature Acceptable
Yes
Work Order Closed by Building Maintenance
Portable 175- Due to the incorrect setting of the mode of operation the space temperature was 55 deg. while both the teacher and students were in the portable. See comment above, thermostat was in the wrong mode.
Misc. Comments
Some brand new spare filters stored in the mechanical room and laying open outside the boxes collecting dust and exposed to the outside elements losing the performance level of brand new filters.
Work Order Number(s)
257254
Issues found durring this assessment have been assigned to the above work order(s).