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Ventilation Occupant Observations Check Procedure (OCP)

The Ventilation OCP is for facilities that have decided to capture their ventilation operations, maintenance, and transparency status. It is for room users. The entries are date and time stamped so that data can be collected during the day and capture any ventilation OFF events. This application is installed on the organizations or our servers and staff are requested to add their room observations. A ventilation quality team periodically reviews the data to correct problems and to determine if a more comprehensive Ventilation Quality Improvement Indicator is needed like the QIDC.

If you want your own free Ventilation OCP portal Request Portal

Visit FVSE to see if your facility is in our database.

Survey Questions

Facility & Room Name: e.g. My High School B301

Note: NA - Not Applicable

The survey is always looking for a Yes response if things are okay. If things are NOT okay then the survey asks for a No response. All responses are then counted and tagged in the report.

1. If it is cold outside the space is not too hot?

            Yes No (excess carbon) Too Cold (bad comfort level)

2. If it is hot outside the space is not too cold?

            Yes No (excess carbon) Too Hot (bad comfort level)

3. Is the ventilation system ON and does not turn OFF during your entire stay in the space?

            Yes No

4. If the ventilation system was not ON do you have access to turn On the ventilation system?

            Yes No NA ventilation was ON

5. If the ventilation system was not ON, did you turn on the ventilation system upon room entry?

            Yes No NA ventilation was ON

6. Can you hear the ventilation running or feel the ventilation on your face?

            Yes No

7. Do the vents have 6 or more feet of clearance?

            Yes No

8. Is the ACH level posted or displayed on a status panel in the room?

            Yes No NA activity not started

9. If the ACH level is posted or displayed on a status panel what is it (1-24+)?

            ACH:

10. Is the CFM level displayed on a status panel in the room?

            Yes No NA activity not started

11. If the CFM level is displayed on a status panel what is it (100, 200, n)?

            CFM:

12. Have you been told that there is a Ceiling Level UV system and that it is On?

            Yes No NA

13. Have you been told that there is a FAR UV system installed and that it is On?

            Yes No NA

14. There are no perfume odors?

            Yes No (there are perfume odors)

15. There are no food odors?

            Yes No (there are food odors)

16. There are no mildew or mold signs or odors?

            Yes No (there is mildew or mold)

17. The space is not stuffy?

            Yes No (space is stuffy space)

18. All the vents are not dirty?

            Yes No (for dirty vents)

19. There was no recent respiratory infection / COVID event in this space?

            Yes No (there was a COVID event)

20. What is the date and time of this report?

            Date Time:

21. Comments:

After you save you can browse back and add another room. Data File . Report

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ACH Level Measurement Guidance

The following steps can be used by staff to determine the ACH levels in each room. This can be used to determine the ACH level as part of self-certification or to check on the results provided by a vendor.

Equipment List

There is no special equipment or high cost equipment needed to execute this protocol. The equipment list is as follows:

1. Tape Measure to measure room size and vent opening sizes.

2. Handheld low cost Anemometer to measure vent air flow in Feet Per Minute (FPM).

Example Anemometer

Data Collection

1. Determine the Room ACH Level using the following steps.

https://www.youtube.com/watch?v=HlneLDi9r54 (video on how to calculate air changes per hour)

2. Measure the room Length, Width, and Height in feet and calculate the room cu-ft.

Room cu-ft = Length * Width * Height

3. If there are square and or rectangular vents measure each vent opening Length and Width in inches and calculate the area in sq-in for each vent.

Vent Area = Vent Length * Width

4. If there are vents with round necks determine each vent diameter opening in inches and calculate the area in sq-in for each vent.

8, 10, 12, 14 Diameter

8, 10, 12, 14 Diameter

1-slot, 2 ft = 6 Diameter
2-slot, 2 ft = 8 Diameter
2-slot, 4 ft = 8 Diameter
2-slot, 4 ft = 10 Diameter

Vent Area = (22/7) * (diameter/2) * (diameter/2)

5. If there is an in-room unit ventilator measure the vent opening in inches and calculate the area in sq-in for each in-room unit ventilator or enter the CFM.

Come in 750, 1000, 1250, 1500 CFM
physical sizes of 69, 81, 93, 105 inches
or 5.75, 6.75, 7.75, 8.75 feet

Vent Area = Vent Length * Width or enter CFM if known

6. If there is an Inverter 360 Cassette measure the vent opening in inches and calculate the area in sq-in for each Inverter 360 Cassette or enter the CFM.

Air flow rate is selectable
High, Mid, Low or 874, 729, 621 CFM.

Vent Area = (22/7) * (diameter/2) * (diameter/2) or enter CFM if known

7. Measure each vent air flow using a handheld low cost anemometer.

a. Set the meter to read the maximum FPM

b. Move meter across the vent opening

c. Take multiple readings, especially for square diffuser vents

d. Use the highest most common reading

e. The numbers will be close enough

f. Use a broom stick(s) to attach the anemometer and reach ceiling vents

g. Do not use a ladder, it will significantly slow the progress

8. Calculate the total ACH using the following steps.

a. Room CFM = Total Vent sq-in * Total FPM / 144

b. Room ACH = Room CFM * 60 / Room cu-ft

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