Preventative Maintenance

From IAQforms

This page describes preventative maintenance steps that are critical to facility managers. Preventative maintenance is a series of routines, procedures and steps that are taken in order to try to identify and resolve potential problems before they happen.

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Outdoor Air Intakes

• Check for airflow obstructions
• Clean intake louvres
• Clean bird screen
• Confirm that any automated dampers are working
• Clean up any debris near intakes
• Check for any new or previously unknown pollution sources near the intakes
• Check for stagnant water near intakes
• Field verify outdoor air flow rates

Filters

• Check the condition of filters in the rack
• Check for any air bypassing filters
• Check pressure drop across filter section and replace dirty filters
• Replace damaged or wet filters

Air Handling Unit

• Inspect cooling coil cleanliness
  • Measure coil face velocity
• Clean cooling coils
• Check condensate drain pan
  • Clean and flush condensate drain pans
• Check belts and fan
  • Clean if necessary
• Inspect drainline and clean if necessary
  • Verify any p-traps are properly functioning
• Inspect humidifier, if one
• Calibrate control system

Ductwork

• Inspect ductwork for dirt build-up, blockages, moisture, mold and animal infestations
  • Contract for professional duct cleaning if problems are discovered
• Inspect supply diffusers and return grilles for dirt build up and microbial growth
  • Clean any dirt buildup

Pressurization

• Verify that the building is under a positive pressure in relation to outdoors.
• Verify areas of known pollution sources be under a negative pressure
  • Photocopy rooms
  • Restrooms
  • Kitchens
  • Manufacturing processes
  • Stored chemicals
• Verify areas of known sensitive individuals be under a positive pressure
• Verify that all exhaust fans are in working order

Occupied Space

• Identify any water stains including stained ceiling tiles
• Identify any unusual odors in the space
• Identify any signs of discomfort (e.g. fans, space heaters, covered supply diffusers)
• Identify any changes to space usage
• Verify thermostat settings
• Measurements of temperature, RH and CO2

Surrounding Areas

• Identify any water pooling near the foundation
• Inspect building exterior for any signs of structural problems or moisture damage