Cleanroom HVAC Design Calculator

Some readings that may be of interest to you:

HOW DOES THE CLEANROOM CALCULATOR WORK?

For every classified room (ISO 8, ISO 7, ISO 6, ISO 5) in your cleanroom project (anteroom/gowning room, clean zone, etc.), complete a separate row in the table with:

Room length (ft)
Room width (ft)
Room height (ft)
Cleanroom class (ISO 8, ISO 7, ISO 6, ISO 5)
Process generating particles
Lighting level

What can you determine with our cleanroom calculator tool?

Total airflow in cubic feet per minute (CFM) needed for the cleanroom project
Air changes per hour (ACH) per classified room (ISO 8, ISO 7, ISO 6, ISO 5)
Quantity of low air returns
Quantity of HEPA filters
Quantity of lighting fixtures

CLEANROOM CFM CALCULATOR

For the calculation, we assume 10 to 30 air changes per hour (ACH) for an ISO 8; 30 to 65 ACH for an ISO 7; 80 to 150 ACH for an ISO 6; 200 to 450 ACH for an ISO 5. If there is a significant generation of particles in the process, we use the higher number in the range.

Disclaimer: This is a rule of thumb only. A lot of aspects are not taken into consideration for the calculation, including but not limited to, heat gain, number of people, the use of a fume hood, etc. Clean room HVAC design calculations should be computed by a clean room HVAC specialist.

If you want help with your clean room design calculation or you want to receive a more detailed price per square foot, fill out a request for quote and one of our experts will contact you.

Use a separate table for every classified room in your clean room project (anteroom/gowning room, clean zone, etc.) by clicking on “+Add a room”. Once you are done, click “Calculate”.

Classified Room 1

Delete

Ceiling height is usually 8 or 9 feet high.This estimation tool is not suitable for ceiling height over 10 feet.

In drug compounding, ISO 5 is usually reached inside the laminar airflow workbench (LAFW) located in a classified ISO 7 class cleanroom. Therefore, for this particular application, a classified ISO 5 room is not necessary.

This estimation tool is not suitable for an ISO 5 class cleanroom or lower. A different and more complex calculation is required along with the use of unidirectional airflow. Contact our expert to discuss your project.

+ Add a room Calculate + Add a room

Results

Room	Air changes per hour (ACH)	Quantity of lighting fixtures(a lighting fixture = 4 fluorescent ballasts)	Quantity of HEPA filters(600 CFM per filter)	Quantity of low air returns(500 CFM per filter)
Classified Room 1
Total Quantity
Total CFM needed

Ceiling height is usually 8 or 9 feet high.This estimation tool is not suitable for ceiling height over 10 feet.

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