Ventilation Checklist

Name:

School:

Unit Ventilator/AHU No:

Room or Area:

Date Completed:

Signature:

Marked locations of all outdoor air intakes on a small floor plan (for Yes No N/A example, a fire escape floor plan)

• Yes
• No
• N / A

Ensured that the ventilation system was on and operating in “occupied” mode .

• Yes
• No
• N / A

Ensured that outdoor air intakes are clear of obstructions, debris, clogs, or covers

• Yes
• No
• N / A

Installed corrective devices as necessary (e.g., if snowdrifts or leaves frequently block an intake)

• Yes
• No
• N / A

Checked ground-level intakes for pollutant sources (dumpsters, loading docks, and bus-idling areas)

• Yes
• No
• N / A

Checked rooftop intakes for pollutant sources (plumbing vents; kitchen, toilet, or laboratory exhaust fans; puddles; and mist from air-conditioning cooling towers)

• Yes
• No
• N / A

Resolved any problems with pollutant sources located near outdoor air intakes (e.g., relocated dumpster or extended exhaust pipe)

• Yes
• No
• N / A

Obtained chemical smoke (or a small piece of tissue paper or light plastic)

• Yes
• No
• N / A

Confirmed that outdoor air is entering the intake appropriately

• Yes
• No
• N / A

Replaced filters per maintenance schedule

• Yes
• No
• N / A

Shut off ventilation system fans while replacing filters (prevents dirt from blowing downstream)

• Yes
• No
• N / A

Vacuumed filter areas before installing new filters

• Yes
• No
• N / A

Confirmed proper fit of filters to prevent air from bypassing (flowing around) the air filter

• Yes
• No
• N / A

Confirmed proper installation of filters (correct direction for airflow)

• Yes
• No
• N / A

Ensured that drain pans slant toward the drain (to prevent water from accumulating)

• Yes
• No
• N / A

Cleaned drain pans

• Yes
• No
• N / A

Checked drain pans for mold and mildew

• Yes
• No
• N / A

Ensured that heating and cooling coils are clean

• Yes
• No
• N / A

Ensured that the interior of air-handling unit(s) or unit ventilator (air-mixing chamber and fan blades) is clean

• Yes
• No
• N / A

Ensured that ducts are clean

• Yes
• No
• N / A

Checked mechanical room for unsanitary conditions, leaks, and spills

• Yes
• No
• N / A

Ensured that mechanical rooms and air-mixing chambers are free of trash, chemical products, and supplies

• Yes
• No
• N / A

Ensured that air dampers are at least partially open (minimum position)

• Yes
• No
• N / A

Ensured that minimum position provides adequate outdoor air for occupants

• Yes
• No
• N / A

Obtained and reviewed all design inside/outside temperature and humidity requirements, controls specifications, as-built mechanical drawings, and controls operations manuals (often uniquely designed)

• Yes
• No
• N / A

Turned summer-winter switches to the correct position

• Yes
• No
• N / A

Set time clocks appropriately

• Yes
• No
• N / A

Ensured that settings fit the actual schedule of building use (including night/weekend use)

• Yes
• No
• N / A

Ensured appropriate system pressure by testing line pressure at both the occupied (day) setting and the unoccupied (night) setting

• Yes
• No
• N / A

Checked that the line dryer prevents moisture buildup

• Yes
• No
• N / A

Replaced control system filters at the compressor inlet based on the compressor manufacturer’s recommendation (for example, when you blow down the tank)

• Yes
• No
• N / A

Set the line pressure at each thermostat and damper actuator at the proper level (no leakage or obstructions)

• Yes
• No
• N / A

Ensured that the outdoor air damper is visible for inspection

• Yes
• No
• N / A

Ensured that the recirculating relief and/or exhaust dampers are visible for inspection

• Yes
• No
• N / A

Ensured that the recirculating relief and/or exhaust dampers are visible for inspection

• Yes
• No
• N / A

Checked that the outdoor air damper fully closes within a few minutes of shutting off appropriate air handler

• Yes
• No
• N / A

Checked that the outdoor air damper opens (at least partially with no delay) when the air handler is turned on

• Yes
• No
• N / A

If in heating mode, checked that the outdoor air damper goes to its minimum position (without completely closing) when the room thermostat is set to 85°F

• Yes
• No
• N / A

If in cooling mode, checked that the outdoor air damper goes to its minimum position (without completely closing) when the room thermostat is set to 60°F and mixed air thermostat is set to 45°F

• Yes
• No
• N / A

If the outdoor air damper does not move, confirmed the following items:

• The damper actuator links to the damper shaft, and any linkage set screws or bolts are tight

• Moving parts are free of impediments (e.g., rust, corrosion)

• Electrical wire or pneumatic tubing connects to the damper actuator

• The outside air thermostat(s) is functioning properly (e.g., in the right location, calibrated correctly)

Disconnected power to controls (for automatic reset only) to test continuity across terminals

• Yes
• No
• N / A

Confirmed (if applicable) that depressing the manual reset button (usually red) trips the freeze stat (clicking sound indicates freeze stat was tripped)

• Yes
• No
• N / A

Assessed the feasibility of replacing all manual reset freeze-stats with automatic reset freeze-stats

• Yes
• No
• N / A

Ensured that the mixed air stat for heating mode is set no higher than 65°F

• Yes
• No
• N / A

Ensured that the mixed air stat for cooling mode is set no lower than the room thermostat setting

• Yes
• No
• N / A

Confirmed proper economizer settings based on design specifications or local practices

• Yes
• No
• N / A

Checked that sensor on the economizer is shielded from direct sunlight

• Yes
• No
• N / A

Ensured that dampers operate properly (for outside air, return air, exhaust/relief air, and recirculated air), per the design specifications

• Yes
• No
• N / A

Ensured that all fans (supply fans and associated return or relief fans) that move outside air indoors continuously operate during occupied hours (even when room thermostat is satisfied)

• Yes
• No
• N / A

Ensured that supply and return air pathways in the existing ventilation system perform as required

• Yes
• No
• N / A

Ensured that passive gravity relief ventilation systems and transfer grilles between rooms and corridors are functioning

• Yes
• No
• N / A

Made sure every occupied space has supply of outdoor air (mechanical system or operable windows)

• Yes
• No
• N / A

Ensured that supply and return vents are open and unblocked

• Yes
• No
• N / A

Modified the HVAC system to supply outside air to areas without an outdoor air supply

• Yes
• No
• N / A

Modified existing HVAC systems to incorporate any room or zone layout and population changes

• Yes
• No
• N / A

Moved all barriers (for example, room dividers, large free-standing blackboards or displays, bookshelves) that could block movement of air in the room, especially those blocking air vents

• Yes
• No
• N / A

Ensured that unit ventilators are quiet enough to accommodate classroom activities

• Yes
• No
• N / A

Ensured that classrooms are free of uncomfortable drafts produced by air from supply terminals

• Yes
• No
• N / A

Ensured that air flows out of the building (using chemical smoke) through windows, doors, or other cracks and holes in exterior wall (for example, floor joints, pipe openings)

• Yes
• No
• N / A

Checked (using chemical smoke) that air flows into exhaust fan grille(s)

• Yes
• No
• N / A

If fans are running but air is not flowing toward the exhaust intake, check for the following:

• Inoperable dampers

• Obstructed, leaky, or disconnected ductwork

• Undersized or improperly installed fan

• Broken fan belt

Checked (using chemical smoke) that air is drawn into the room from adjacent spaces

Ensured that air is flowing toward the exhaust intake

Checked that the exhaust ductwork downstream of the exhaust fan (which is under positive pressure) is sealed and in good condition .

• Yes
• No
• N / A

Measured the quantity of outdoor air supplied (22a) to each ventilation unit

• Yes
• No
• N / A

Calculated the number of occupants served (22b) by the ventilation unit under consideration

• Yes
• No
• N / A

Divided outdoor air supply (22a) by the number of occupants (22b) to determine the existing quantity of outdoor air supply per person (22c)

• Yes
• No
• N / A

Compared the existing outdoor air per person (22c) to the recommended levels in Table 1

• Yes
• No
• N / A

Corrected problems with ventilation units that supplied inadequate quantities of outdoor air to ensure that outdoor air quantities (22c) meet the recommended levels in Table 1

• Yes
• No
• N / A