Each LakeAir brand cleaner provides a level of air cleaning capacity which is measured in cubic feet per minute (cfm). This is determined by the size of the room and the number of air changes per hour. Follow the steps below to help you determine which model will effectively clean your home or workspace.

Pollutant Concentration
Suggested Air Changes Per Hour
Typical Application
4 – 8
Living rooms, bedrooms and waiting areas
9 – 12
Computer areas and kitchens
13 – 16
Restaurants, bars and banquet halls

To Determine Your Needs

Measure the size of the area to calculate the volume in cubic feet.

Enter the LENGTH of the room:

Enter the WIDTH of the room:

Enter the HEIGHT of the room:

Enter air CHANGES per hour:

CFM required to purify the air in this room:


A 15’ X 15’ X 15’ living room

Step 1:  15 x 15 x 15 = 3375 ft3

Step 2:  3375 ft3 / 60 minutes = 56.25 ft3 per minute

Step 3:  56.25 ft3 per minute x 8 air changes per hour ( an average polution level ) = 450 cfm (cubic feet per minute)

Step 4:  A LakeAir LA-Table model would be ideal for this space. The LA-Table is available in electrostatic, media filter and HEPA filter models.