1. Input Type
Calculate for clean air delivery rate (CADR)

Determine the air cleaner(s) required in a room to reach a target equivalent air exchange rate (eACH).

Click to select this type

Calculate for maximum room size

Find the largest room acceptable for a given clean air delivery rate (CADR), to reach a target equivalent air exchange rate (eACH).

Click to select this type

Room Size Clean Air Delivery Rate
Imperial
Metric
ft2
m2
CFM
m3/hr

Note: Find the CADR from the air cleaner manufacturer in cubic feet per minute, or CFM. If multiple numbers are listed, use the one for “dust”. Note: Find the CADR from the air cleaner manufacturer in cubic meters per hour, or m3/hr. If multiple numbers are listed, use the one for “dust”.

ft.
m.
2. Room Ventilation Levels
ACH
Reset value
3. Goal Air Exchanges Per Hour
eACH
Ideal icon Ideal (6 ACH) Excellent icon Excellent (5-6 ACH) Good icon Good (4-5 ACH) Minimum icon Minimum (3-4 ACH) Low icon Low (< 3 ACH)
Ideal icon Ideal (6 ACH) Excellent icon Excellent (5-6 ACH) Good icon Good (4-5 ACH)
Minimum icon Minimum (3-4 ACH) Low icon Low (< 3 ACH)
Results

Configure the settings and then click the button below to calculate.


Important: Portable air cleaning is only one method for reducing airborne particles indoors, including those that may contain infectious viruses or bacteria, or those from outdoor/indoor pollution. For more info on portable air cleaners, please review our report on PACs for infectious disease reduction or our wildfire advisory.