Filtration

• 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?

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

Controls

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

Methods

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