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Air Filters for Business to Business Education

Trouble Shooting Guide
Problem Possible Causes Corrective Action
Dirt, particulates or other solid contaminants in the post-treatment air Improper filter installation Inspect hardware and reinstall.
Leakage or bypass Inspect system for leak paths and plug or repair.
Improper filter selection Review and double-check filter selection/bid requirements.
Recirculation or make up air is supplied untreated Inspect and confirm system flow paths. Reroute or eliminate untreated flow paths.
Source is post filtration devices. Reconfirm source location and move or eliminate.
Odor, smell or other gaseous contaminants in the post-treatment air stream New/Clean filter or component contamination from vendor. Inspect filters and check for source path. Include the manufacturer in the search.
Mismatch of filter capability and challenge aerosol Review contaminant list and cross check with filter capability.
Mold growth on the filter Check upstream sources and presence of water. Remove and replace filters. Consider antimicrobial treated filters.
Mold growth on the system components. Check system for sources. Review filter/system compatibility issues. Clean system and consider antimicrobial alternatives.
Filter change out cycle is shorter than expectations Excessive contaminant present. Inspect hardware and reinstall.
Nature of contaminant components are not as predicted. Inspect system for leak paths and plug or repair.
Inappropriate filter selection.

Review and double-check filter selection/bid requirements.

Ineffective maintenance or service protocol.

Inspect and confirm system flow paths. Reroute or eliminate untreated flow paths.

Reconfirm source location and move or eliminate.

Energy consumption is excessive Mismatch of application needs and filtration products. Inspect filters and check for source path. Include the manufacturer in the search.
Poor maintenance practices (including non-filter related issues). Review contaminant list and cross check with filter capability.
Duty cycle/control settings are too agressive.

Check upstream sources and presence of water. Remove and replace filters. Consider antimicrobial treated filters.

Check system for sources. Review filter/system compatibility issues. Clean system and consider antimicrobial alternatives.

Poor or decreasing heating and cooling effects Flow balance ineffective. Measure and review flow rate status. Consider outsourcing a professional analysis.
System controls and setup inappropriate. Review the fresh air/make up air ratios and thermostat settings.
Filter selection and application done incorrectly. Contact an HVAC vendor as well as the filter manufacturer for recommendations.
IAQ complaints from occupants Ventilation amount and composition does not comply with guidelines. Review and implement commonly accepted standards (example ASHRAE Indoor Air Quality Standard 62.1).
Thermal comfort is compromised from expectations. Revisit original heating and cooling calculations. Measure and confirm status.
Filtration effectiveness is insufficient. Quantify performance via third party analysis or develop self analysis protocol.
 

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