1. Are any inlets located near parking or major vehicle traffic route?
2. Are there any signs of blockage to the fresh air inlets, leaves etc?
3. Has the roof been repaired recently?
4. Are there any exhaust air outlets within 2 m of the fresh air inlets/?
5. Are there any major parking areas and major traffic routes in the vicinity, of occupant entrances?
6. Can inward airflow be sensed at the occupant entrances?
7. How many exhaust air outlets are there from the building?
8. Are any of the exhaust air outlets facing in the direction of fresh air inlets?
9. Are there any wet spots on the walls and floors?
10. Are there any signs of water staining or molds?
11. Are there dust marks around ceiling diffusers and return air grilles?
12. Are there any condensations on the windows or windows or windowsills?
13. Are there any other stains or residues left behind from under-diluted industrial cleaner?
14. Are there any noticeable odors?
15. Does air motion appear restricted at diffusers and grilles?
16. Have any ventilation grilles been blocked?
17. Are there any printers/facsimiles/photocopying machines in the office space?
18. Can occupants adjust the temperature setting on the thermostat?
19. Do air filters appear to need cleaning?
20. Are their any filters that contain aldehyde resins?