FMD Coronavirus Response 2022

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Facilities Management and Development COVID-19 Updates

Last updated October 2022

For more information about COVID-19, please visit campus COVID-19 website.



HVAC

In the summer of 2020, the CSU Chancellor's Office issued guidance on building HVAC (Heating, Ventilation, and Air-Conditioning) operations during the COVID-19 Pandemic. This guidance was prepared in consultation with the CSU Mechanical Review Board (MRB), as well as incorporating specific guidance from the American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) and the National Institute for Building Science (NIBS). The mandatory and elective recommendations were informed by references to specific epidemiology studies providing factual basis for this guidance.

Our teams have implemented the mandatory model practices in every academic building. We have performed an HVAC assessment to determine compliance with the HVAC mandatory model practices. Any issues found to not meet model practices were either corrected on the spot or a maintenance work order has been issued to implement corrections.

Mandatory Model Practices

  • Ensure that all fume hoods are operating correctly in lab spaces.
  • Disable ceiling fans and do not allow use of pedestal or personal fans in rooms with more than one occupant.
  • Ensure final filters in air handling units are installed properly to limit air bypass (air going around the filter).
  • Do not increase total airflow or the number of air changes per hour into spaces.
  • Ensure that all exhaust fans are operational.
  • Change clogged filters and clean drip pans according to manufacturer spaces.
  • Demand-controlled ventilation systems overridden and set to maximum air-flow.
  • Ensure that airflow and temperature alarms are set up and communicating properly.
  • Where feasible, keep doors and operable windows open to promote ventilation when outside air conditions are acceptable.
  • Exhaust systems should run 24 hours per day, seven days per week.
  • Do not open operable windows in restrooms.
  • Ensure that all ASHRAE recommendations for HVAC maintenance and filter replacement have been implemented.
  • Maximized outside air intake to the extent that it doesn’t compromise indoor air conditions for occupants. Relative humidity should be maintained between 40-60% and indoor air temperatures between 68-72 degrees Fahrenheit when heating and 70-78 degrees Fahrenheit when cooling.
  • Program a flushing sequence for the building automation system (BAS) to operate the HVAC system for one to two hours before and after occupancy.
  • At Cal Poly we have evaluated all academic building Air Handling Units (AHU) to determine if a higher-rated filter such as MERV 13 or higher can be installed without significant redesign or reconfigurations. Those AHUs that could accept MERV 13 or higher were installed or will be installed once we receive the filter(s). This work is continous and being done on a routine basis.



    HVAC Building Filter Assessment

    Click on the collapsible panel to open and close it. Click here to see Legends definition.

    • Administration Building 01
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 15 N/A
      S-2 MERV 15 N/A
      S-3 MERV 15 N/A
      S-4 MERV 13 N/A
    • Cotchett Education Building 02
      Equipment Type Filter Type Potential For Upgrade To
      AHU-7 MERV 13 N/A
      AHU-8 MERV 13 N/A
      AHU-9 MERV 13 N/A
      FC-3 MERV 13 N/A
      FC-4 MERV 13 N/A
      FC-5 MERV 13 N/A
      FC-6 MERV 13 N/A
      FC-7 MERV 13 N/A
      FC-8 MERV 11 MERV 13
      FC-9 MERV 11 MERV 13
      FC-10 MERV 11 MERV 13
      FC-11 MERV 11 MERV 13
      FC-12 MERV 11 MERV 13
    • Business Building 03
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A
      AHU-3 MERV 13 N/A
      AHU-4 MERV 13 N/A
      AHU-5 MERV 13 N/A
      AHU-6 MERV 13 N/A
    • Architecture and Environmental Building 05
      Equipment Type Filter Type Potential For Upgrade To
      FC-1 MERV 11 MERV 13
      FC-2 MERV 11 MERV 13
      FC-3 MERV 11 MERV 13
      FC-4 MERV 11 MERV 13
      FC-5 MERV 11 MERV 13
      FC-6 MERV 11 MERV 13
      FC-7 MERV 11 MERV 13
      FC-8 MERV 11 MERV 13
      FC-9 MERV 11 MERV 13
      FC-10 MERV 11 MERV 13
      FC-11 MERV 11 MERV 13
      FC-12 MERV 11 MERV 13
      FC-13 MERV 11 MERV 13
      FC-14 MERV 11 MERV 13
      FC-15 MERV 11 MERV 13
      FC-16 MERV 11 MERV 13
      FC-17 MERV 11 MERV 13
      FC-18 MERV 11 MERV 13
      FC-19 MERV 11 MERV 13
      FC-20 MERV 11 MERV 13
      FC-21 MERV 11 MERV 13
      S-1 MERV 13 N/A
      SF-2 MERV 13 N/A
    • Christopher Cohan Center Building 06
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A
      AHU-3 MERV 13 N/A
      AHU-4 MERV 13 N/A
      AHU-5 MERV 13 N/A
    • Advanced Technologies Laboratories Building 07
      Equipment Type Filter Type Potential For Upgrade To
      AC-1 MERV 13 NO
      AC-2 MERV 13 NO
      AC-3 MERV 13 NO
    • Bioresource and Agricultural Engineering Building 08
      Equipment Type Filter Type Potential For Upgrade To
      AH-1 MERV 13 NO
      AHU-2 MERV 13 NO, Gas Furnance
    • Bioresource and Agricultural Engineering Building 08A
      No mechanical ventilation equipment, heating only
    • Alan A. Erhart Agriculture Building 10
      Equipment Type Filter Type Potential For Upgrade To
      SF-1 MERV 13 N/A
      SF-2 MERV 13 N/A
    • Agricultural Sciences Building 11
      Equipment Type Filter Type Potential For Upgrade To
      AH-1 MERV 14 N/A
      AH-2 MERV 13 N/A
      AH-3 MERV 14 N/A
      WALL MERV 11 NO
    • Engineering Building 13
      Equipment Type Filter Type Potential For Upgrade To
      FC-1 MERV 13 N/A
      FC-2 MERV 13 N/A
      FC-3 MERV 13 N/A
      FC-4 MERV 13 N/A
      HV-1 MERV 13 N/A
      HV-2 MERV 13 N/A
      HV-3 MERV 13 N/A
      HV-4 MERV 13 N/A
      HV-5 MERV 13 N/A
      HV-7 MERV 13 N/A
      HV-8 MERV 13 N/A
      HV-9 MERV 13 N/A
      HV-10 MERV 13 N/A
      HV-11 MERV 13 N/A
    • Frank E. Pilling Building 14
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 MERV 16 v-bank
      AHU-4 MERV 13 N/A
      AHU-5 MERV 13 N/A
      AHU-6 Server Room MERV 13 N/A
      WALL Supply Air Intake Wall MERV 11 (MECH RM) NO
    • Beef Unit Building 16
      No mechanical ventilation equipment, heating only
    • Crops Unit Building 17
      Equipment Type Filter Type Potential For Upgrade To
      F0027470 *Heating System only NO, Gas Furnance
      F00247480 *Heating System only NO, Gas Furnance
    • Crop Science Lab Building 17A
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 3 NO, Gas Furnance
      AHU-2 MERV 3 NO, Gas Furnance
    • Dairy Science Milking Parlor Building 18
      Equipment Type Filter Type Potential For Upgrade To
      F-1 MERV 11 NO, Gas Furnance
      F-2 MERV 11 NO, Gas Furnance
      F-3 MERV 11 NO, Gas Furnance
      F-4 MERV 11 NO, Gas Furnance
    • Leprino Foods Dairy Innovation Institute Building 18A
      Equipment Type Filter Type Potential For Upgrade To
      AH-1 Airguard #2995902, Micro V-2000, HEPA, 99.99% rigid N/A
      AH-2 Airguard #2995902, Micro V-2000, HEPA, 99.99% rigid N/A
      AH-3 Airguard #2995902, Micro V-2000, HEPA, 99.99% rigid N/A
      AH-4 Airguard #2995902, Micro V-2000, HEPA, 99.99% rigid N/A
      AH-5 Airguard #2995902, Micro V-2000, HEPA, 99.99% rigid N/A
      FC-1 MERV 13 N/A
      FC-2 MERV 13 N/A
      FC-3 MERV 13 N/A
      FC-4 MERV 13 N/A
      FC-5 MERV 13 N/A
      FC-6 MERV 13 N/A
      FC-7 MERV 13 N/A
      FC-8 MERV 13 N/A
      FC-9 MERV 13 N/A
      FC-10 MERV 13 N/A
      FC-11 MERV 13 N/A
      FC-12 MERV 13 N/A
      FC-13 MERV 13 N/A
      FC-14 MERV 13 N/A
      FC-15 MERV 13 N/A
      FC-16 MERV 13 N/A
      FC-17 MERV 13 N/A
      SF-21A MERV 13 N/A
    • Engineering East Building 20
      Equipment Type Filter Type Potential For Upgrade To
      CF-1 MERV 11 MERV 13
      CF-2 MERV 11 MERV 13
      CF-3 MERV 11 MERV 13
      CF-4 MERV 11 MERV 13
      FC-1 MERV 11 MERV 13
      FC-2 MERV 11 MERV 13
      FC-3 MERV 13 N/A
      FC-4 MERV 11 MERV 13
      FC-5 MERV 11 MERV 13
      FC-6 MERV 11 MERV 13
      FC-7 MERV 11 MERV 13
      FC-8 MERV 11 MERV 13
      FC-9 MERV 11 MERV 13
      FC-10 MERV 11 MERV 13
      FC-11 MERV 13 N/A
      FC-12 MERV 11 MERV 13
      FC-13 MERV 11 MERV 13
      FC-14 MERV 11 MERV 13
      FC-15 MERV 11 MERV 13
      FC-16 MERV 11 MERV 13
      FC-17 MERV 11 MERV 13
      FC-18 MERV 11 MERV 13
      FC-19 MERV 11 MERV 13
      FC-20 MERV 11 MERV 13
      FC-21 MERV 11 MERV 13
      FC-22 MERV 11 MERV 13
      FC-23 MERV 11 MERV 13
      FC-24 MERV 11 MERV 13
      FC-25 MERV 11 MERV 13
      FC-28 MERV 11 MERV 13
      FC-29 MERV 11 MERV 13
      FC-30 MERV 13 N/A
      FC-31 MERV 11 MERV 13
      FC-32 MERV 11 MERV 13
      FC-124 MERV 11 MERV 13
      FC-126 MERV 11 MERV 13
      FC-127 MERV 11 MERV 13
      UH-28 MERV 13 NO
      UH-29 MERV 13 NO
      UH-30A MERV 13 NO
      UH-30B MERV 13 NO
      UH-32A MERV 13 N/A
      UH-32B MERV 13 N/A
      UH-36 MERV 13 N/A
      UH-39 MERV 11 MERV 13
      UH-40 MERV 11 MERV 13
      UH-45A MERV 13 N/A
      UH-45B MERV 13 N/A
      UH-50A MERV 11 MERV 13
      UH-50B MERV 11 MERV 13
      UH-131 MERV 13 NO
    • Bert and Candance Forbes Center for Engineering Excellence Building 20A
      Equipment Type Filter Type Potential For Upgrade To
      HV-101 MERV 13 N/A
    • Engineering West Building 21
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A
      AHU-3 MERV 13 N/A
      AHU-4 MERV 4 Foam Roll Media Needs filter rack
      SF-3 MERV 13 N/A
      SF-5 MERV 13 N/A
      SF-5A MERV 13 N/A
      SF-5B MERV 13 NO
      SF-5C MERV 13 NO
    • Engineering West Addition Building 21A
      Equipment Type Filter Type Potential For Upgrade To
      S-3 MERV 13 N/A
      S-4 MERV 13 N/A
    • English Building 22
      Equipment Type Filter Type Potential For Upgrade To
      S-1 4' Roll Media MERV 4 Needs filter rack
    • Food Processing Building 24
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      HV-2 MERV 13 N/A
      WALL MERV 13 N/A
    • Faculty Offices East Building 25
      No mechanical ventilation equipment, heating only
    • Graphic Arts Building 26
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 16 N/A
      AHU-2 MERV 16 N/A
      AHU-3 MERV 16 N/A
    • Health Center Building 27
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 14 N/A
      S-2 MERV 14 N/A
      S-3 MERV 14 N/A
      S-4 MERV 14 N/A
    • Housing Administration Building 31
      No mechanical ventilation equipment, heating only
    • Oppenheimer Family Equine Center Building 32
      No filters
    • Clyde P. Fisher Science Hall Building 33
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 16 N/A
    • Walter F. Dexter Building 34
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 13 N/A
      S-2 MERV 13 N/A
      S-3 MERV 13 MERV 16 v-bank
      S-4 MERV 13 N/A
      S-5 MERV 13 N/A
      S-6 MERV 11 N/A, DX Unit
    • Robert E. Kennedy Library Building 35
      Equipment Type Filter Type Potential For Upgrade To
      AH-1 MERV 14 N/A
      AH-2 MERV 14 N/A
      AH-3 MERV 14 N/A
      AH-4 MERV 14 N/A
      HV-1 MERV 14 N/A
      HV-2 MERV 14 N/A
      HV-3 MERV 14 N/A
      HV-4 MERV 14 N/A
      HV-5 MERV 14 N/A
      HV-6 MERV 14 N/A
      HV-7 MERV 14 N/A
      HV-8 MERV 14 N/A
    • University Police Building 36
      Equipment Type Filter Type Potential For Upgrade To
      A/C Unit MERV 11 N/A
    • Mathematics and Science Building 38
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 13 N/A
      S-2 MERV 11 MERV 13
      S-3 MERV 11 MERV 13
      S-4 MERV 11 MERV 13
      S-5 MERV 11 MERV 13
      S-6 MERV 11 MERV 13
    • Engineering South Building 40
      Equipment Type Filter Type Potential For Upgrade To
      AH-1 MERV 11 MERV 13
      SF-1 MERV 11 MERV 13
    • Grant M. Brown Engineering Building 41A
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 Pre-filter MERV 13 N/A
      AHU-1 Final Filter MERV 13 N/A
      AHU-2 MERV 11 N/A
    • Baldwin and Mary Reinhold Aerospace Engineering Laboratories Building 41B
      Equipment Type Filter Type Potential For Upgrade To
      Split MERV 11 NO
    • Aero Propulsion Lab Building 41C
      No filters
    • Robert E. Mott Athletics Center Building 42
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A
      AHU-3 MERV 11 MERV 13
      AHU-4 MERV 11 MERV 13
    • Recreation Center Building 43
      Equipment Type Filter Type Potential For Upgrade To
      AH-5(E) MERV 13 N/A
      AHU-1 MERV 16 N/A
      AHU-2 MERV 16 N/A
      AHU-3 MERV 16 N/A
      AHU-4 MERV 16 N/A
      AHU-5 MERV 16 N/A
      AHU-6 MERV 16 N/A
      AHU-7 MERV 16 N/A
      AHU-8 MERV 16 N/A
      AHU-9 MERV 16 N/A
      AHU-10 MERV 16 N/A
      AHU-10 MERV 11 NO
      AHU-11 MERV 13 N/A
    • Kinesiology Building 43A
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 11 Pre-Filters NO
      AHU-1 MERV 13 Final Filters NO
    • Alex and Fay Spanos Theatre Building 44
      Equipment Type Filter Type Potential For Upgrade To
      RS-3 MERV 11 MERV 13
      S-3 MERV 13 N/A
    • H.P. Davidson Music Center Building 45
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 8 Roll, Replace Filter Rack MERV 13
      S-2 MERV 8 Roll, Replace Filter Rack MERV 13
    • Theater & Dance Modular Lab Building 45T
      No mechanical ventilation equipment, heating only
    • Crandall Gymnasium & Old Natatorium Building 46
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
    • Faculty Offices North Building 47
      No mechanical ventilation equipment, heating only
    • Science Building 52
      Equipment Type Filter Type Potential For Upgrade To
      MZ-1 MERV 13 N/A
      MZ-2 MERV 13 N/A
      UV-D17 MERV 13 N/A
      UV-E1 MERV 11 NO
      UV-E3 MERV 11 NO
      UV-E22 MERV 11 NO
      UV-E24 MERV 11 NO
      UV-E28 MERV 13 N/A
      UV-E46 MERV 13 N/A
    • Science North Building 53
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 13 N/A
      S-1 MERV 8 Roll Polyester Media, Pre-filter NO
    • Beef Cattle Evaluation Center Building 55
      Equipment Type Filter Type Potential For Upgrade To
      No Filters, Electric Heat only N/A
    • Swine Unit Building 56
      Equipment Type Filter Type Potential For Upgrade To
      No Filters, Electric Heat only N/A
    • Veterinary Hospital Building 57
      Equipment Type Filter Type Potential For Upgrade To
      F-1 MERV 11 N/A, Furnace
    • Veterinary Hospital Annex Building 57A
      Equipment Type Filter Type Potential For Upgrade To
      F-2 MERV 11 N/A, Furnace
    • Welding Building 58
      Equipment Type Filter Type Potential For Upgrade To
      S-1 MERV 11 NO, Furnace, DX Unit
    • Facilities Building 70
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A
      AHU-3 MERV 13 N/A
      AHU-4 MERV 13 N/A
      AHU-5 MERV 13 N/A
      AHU-6 MERV 13 N/A
    • Fleet Services Building 71
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 11 N/A, Furnace
    • Environmental Health & Safety Building 80
      Equipment Type Filter Type Potential For Upgrade To
      MERV 11 N/A, Furnace
    • Chase Hall Building 115
      No mechanical ventilation equipment, heating only
    • Jespersen Hall Building 116
      No mechanical ventilation equipment, heating only
    • Heron Hall Building 117
      No mechanical ventilation equipment, heating only
    • Student Services Building 124
      Equipment Type Filter Type Potential For Upgrade To
      Coming Soon MERV 13 N/A
    • Poultry Science Instructional Center Building 150
      Equipment Type Filter Type Potential For Upgrade To
      F-1 MERV 11 N/A, Furnace
      F-2 MERV 11 N/A, Furnace
      F-3 MERV 11 N/A, Furnace
      F-4 MERV 11 N/A, Furnace
      F-5 MERV 11 N/A, Furnace
    • J & G Lau Family Meat Processing Center Building 155
      Equipment Type Filter Type Potential For Upgrade To
      FC-1 MERV 11 N/A, Furnace, DX Unit
      FC-2 MERV 11 N/A, Furnace, DX Unit
      FC-3 MERV 11 N/A, Furnace, DX Unit
      FC-4 MERV 11 N/A, Furnace, DX Unit
    • Warren J. Baker Center for Science and Mathematics Building 180
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-1 MERV 13 Final Filters N/A
      AHU-1 MERV 11 Final Filters N/A
      AHU-2 MERV 13 N/A
      AHU-2 MERV 11 Pre-filters N/A
      FC 1-1 MERV 13 N/A
      FC 1-2 MERV 13 N/A
      FC 2-1 MERV 13 N/A
      FC 2-2 MERV 13 N/A
      FC 3-2 MERV 13 N/A
      FC 3-3 MERV 13 N/A
      FC 3-4 MERV 13 N/A
      FC 4-1 MERV 13 N/A
      FC 4-2 MERV 13 N/A
      FC 4-3 MERV 13 N/A
      FC 4-4 MERV 13 N/A
      FC 4-5 MERV 13 N/A
      FC 5-1 MERV 13 N/A
      FC 5-2 MERV 13 N/A
      FC 5-3 MERV 13 N/A
      FC 7-1 MERV 13 N/A
    • Construction Innovations Center Building 186
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 15 N/A
      AHU-2 MERV 15, APC, 100% SM, USG N/A
      AHU-3 MERV 15, APC, 100% SM, USG N/A
    • Engineering IV Building 192
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A
    • Bonderson Engineering Project Center Building 197
      Equipment Type Filter Type Potential For Upgrade To
      AHU-1 MERV 13 N/A
      AHU-2 MERV 13 N/A

    Legends

    Click on the collapsible panel to open and close it.

    • Legends
      Abbreviation Definition
      MERV Minimum Efficiency Reporting Value
      S or SF Supply Fan
      AH or AHU Air Handler
      FC or FCU Fan Coil Unit
      WALL Fan Wall
      HV Heating Ventilator
      CF Ceiling Mounted Fan Coil Unit
      UH Unit Heater
      MZ Multi-Zone Unit
      UV Unit Ventilator
      F Furnace
      *F, followed by a series of number, is an identifier for an A/C unit or other refrigeration unit.
      *A number, or series of numbers or letters, is a unique identifier for that unit. It is specific to that facility and does not correlate to total number of HVAC units.
      MERV Rating Description Application Typical Air Filter Material
      MERV-1 to MERV-4 Basic Filter
      Blocks carpet fibers and lint, but unable to block out much else.
      • Light Residential
      • Window/Split AC
      • Fiberglass
      • Washable Aluminum
      • Synthetic Mesh
      MERV-5 to MERV-8 Typical Filter
      Blocks out common dust, pollen, and some mold spores.
      • Typical Residential
      • Typical Commerical
      • Pleated cotton
      • Polyester
      MERV-9 to MERV-12 Better Filter
      Blocks out most mold spores, smog, fine dust, and pet dander.
      • Allergies
      • Better Residential
      • Better Commerical
      • Pleated cotton
      • Microfine Fiberglass
      • Usually 2" thick or more
      MERV-13 to MERV-16 Superior Filter
      Blocks out bacteria, viruses, smoke, and other microscopic particles.
      • Severe Allergies
      • Hospitals
      • Smoking Lounges
      • Pleated cotton
      • Microfine Fiberglass
      • Usually 4" thick or more
      Minimum % of particles removed by air filter
      MERV Rating E1 particles
      (0.3 - 1.0 microns)
      E2 particles
      (1.0 - 3.0 microns)
      E3 particles
      (3.0 - 10.0 microns)
      MERV-1 - - <20%
      MERV-2 - - <20%
      MERV-3 - - <20%
      MERV-4 - - <20%
      MERV-5 - - >20%
      MERV-6 - - >35%
      MERV-7 - - >50%
      MERV-8 - >20% >70%
      MERV-9 - >35% >75%
      MERV-10 - >50% >80%
      MERV-11 >20% >65% >85%
      MERV-12 >35% >80% >90%
      MERV-13 >50% >85% >90%
      MERV-14 >75% >90% >95%
      MERV-15 >85% >90% >95%
      MERV-16 >95% >95% >95%
      Unless otherwise noted above the following are standard discriptions of listed filters
      MERV 11: Beverage Board Frame (BBF) Pleat, 100% Synthenic Media (SM). Typically 1", 2", and 4" deep filters.
      MERV 13 or greater: V-bank, mini-pleat, all plastic construction (APC), no metal components, 100% synthetic media (SM), down stream gaskets (DSG). Typically greater than 4" in depth.
      Can Upgrade To?
      This only ask the question can it physically be done?, will the filter fit?, not will the system be able to perform adequately. This is a much harder question to answer and must be examined must closer and for each fan system.
      Need To Change?
      For MERV 11 BBF pleats, this is only based on the 6 month requirement to proactively change filters. For MERV 13 or greater filters, a time since last change was given. There are no filter DP alarms associated with these types of filters.

    COVID-19 Safety Concerns and Contact Information

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    Facilities Management and Development Help Center

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