Equipment Condition Evaluation

Follow these considerations for an optimal indoor environment capable of minimizing viruses, gases, and bacteria - best when used with ionization and ultra violet C light


Better filtration produces better indoor air quality


  • 1” filters - replaced every 3 months
  • 2” filters - replaced at least every 6 months
  • 4” filters - replaced every year
  • Do you know the filter thickness?
  • What is the scheduled change-out frequency?
  • Who is the filter change-out contractor?
  • How is the filter change-out date confirmed
  • Is each HVAC unit change-out confirmed separately?
  • What brand of filter is used?
  • Is the filter media flat or folded?
  • How many folds per inch?
  • What is the filter MERV rating?


Effective space air flow evaluates to better indoor air quality

Supply Air

  • 2’ x 2’ lay-in ceiling tile grid diffuser
  • 6” round lay-in tile diffuser
  • Slot diffusers
  • Lighting supply air troffers
  • Built-in manually adjustable supply air damper
  • Manually In-line duct supply air damper
  • Motorized VAV supply air diffuser

Return Air

  • Lay-in tile ceiling eggcrate grill
  • Lay-in tile ceiling grill ducted to HVAC unit
  • Under door clearance - return air in corridor
  • Lighting return air troffers
  • Open plenum ceiling return air
  • Ducted return air to HVAC unit

Temperature Controls

Effective controls define the indoor environment


  • Wall mounted conventional thermostat
  • Integrated thermostat (Carrier, Trane…)
  • Builtin WiFi communications
  • Building automation system thermostat


  • Heating and cooling control
  • 1 or 2 stages of heating
  • 1 or 2 stages of cooling
  • Fan control
  • Heating/cooling changeover
  • Modulating controls brand

Outside Air

Optimized outside air delivery enhances indoor air quality

Outside Air

  • Minimum OA only
  • Full economizer
  • Discharge air sensor
  • Return air sensor
  • Mixed air sensor
  • Outside air sensor
  • Economizer vendor
  • Economizer operational
  • Economizer changeover temperature
  • Economizer changeover functional
  • Relief damper installed
  • Motorized relief air damper
  • Bird screen intact
  • Separate OA intake filter
  • OA intake filter condition
  • Building gravity damper relief