SUSTAINABLE BUILDINGS
Asset Classes
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Offices
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- Not applicable
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Enclosed Shopping Centres
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Open Air Retail
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Light Industrial
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Multi-Unit Residential Buildings
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- Not applicable
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Health Care Facilities
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Universal
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Focus Area
Topic
Question #
Question
Are filters in air handling systems inspected/replaced at regular intervals and corrective actions taken when required?
Applicability
Applicable to all buildings (systems or equipment in the owner or landlord’s control)
Answer
Description
Use of ASHRAE Minimum Efficiency Reporting Value MERV 8/8‐A or greater filtration shall be utilized in intermittently occupied areas and used primarily in the protection of HVAC equipment and components only. In regularly occupied areas, a minimum MERV 13/13‐A filter shall be utilized. Pressure gauges shall be used wherever possible to determine the correct change‐out interval of the filters. Filtration of return-air (from systems, such as compartment units, fan-coil units, heat pumps) prevents recirculation of occupant-generated contaminants.
Filtration systems need to be properly maintained in accordance with manufacturers recommendations. Filters should be inspected at least quarterly.
Requirements
- All filters to be rated as per ASHRAE 52.2 (latest version)
- Confirmation of MERV‐A ratings or equivalent must be in writing
- Filters in Constant Velocity systems can be replaced at the manufacturers maximum rated pressure drop providing there is no detrimental effect on air flow. Air filters in VFD systems to be replaced at approximately twice the initial pressure drop to achieve maximum energy savings
- Provide filter inspection records and maintenance log showing frequency of inspection and replacements
- Outline corrective actions taken or plan to address issues identified
Documentation
- Filter rating (ASHRAE test reports including Appendix “J” testing or written confirmation from supplier that filters do not decrease in efficiency through their life)
- Filter replacement schedule
- Filter inspection records and maintenance log
- Corrective actions
Adapted BB3 Question
Question 03.04.01 – What MERV filters are in use for all outdoor air and return air (i.e. circulating air) systems? And Question 03.04.03 – Are measures in place to alert building operators that HVAC filtration systems need replacement?
Suggested Lead
References
Crosswalk
Other Notes
Scoring
3 Points