SUSTAINABLE BUILDINGS

Asset Classes

Focus Area

Indoor Air Quality and Hazards

Topic

Filtration

Question #

I3.2 — MERV Filter Rating

Question

Are filters with MERV rating 13 or higher installed on AHUs?

Applicability

Applicable to Office, Healthcare, Enclosed Shopping Centre, Universal and Multi-Unit Residential buildings

Answer

Yes or No

Description

Installation of filtration systems that meet ASHRAE Minimum Efficiency Reporting Value (MERV) 13 or equivalent prevent larger outdoor air contaminants, such as mould spores, pollen, some dusts, and aerosols from entering the HVAC system. Installation of filtration systems that meet ASHRAE MERV 13 to 16 prevent up to 90% of fine outdoor air contaminants, such as mould spores, pollen, dusts, and aerosols from entering the HVAC system.

Requirements

  1. Provide evidence of the MERV filter rating or equivalent. All filters must be rated as per ASHRAE 52.2
  2. Filters must be replaced at or before the pre-determined pressure drop or timeframe, not exceeding the manufacturer’s specifications and ASHRAE Standard 180 (Maintenance Standard)

Documentation

  • Filter rating (MERV 13 to 16) or equivalent, such as via inventory list, product box, photos
  • Filter replacement schedule

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?

Suggested Lead

In-house

References

Crosswalk

TBD

Other Notes

None

Scoring

4 Points

Verification