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Easy to use smoke eater calculator

     Below you will find the necessary smoke eater calculator to determine which machines will best suit your needs and how many you will need.  Each set of circumstances will dictate the layout and number of smoke eaters necessary per room or area.  For instance, you may require fewer office smoke eaters than restaurant smoke eaters.  That is why there are different sizes and types of machines.  This information is for reference only, in determining how many smoke removal air purifiers are necessary for your conditions.  We are happy to talk to you by phone so you get the perfect fit for your specific situation.

How do I know which machine  and how many I will need?

     The simple smoke eater calculator below will help you determine which machine you may want and how many are needed for each room.  Start by finding out the amount of cubic feet per minute (CFM) required.

CFM required = Length of room x Width x Height x ACH (air changes per hour) / 60 min

Enter - L - Length of your room measured in feet L =
Enter - W - Width of your room measured in feet W =
Enter - H - Height of your room measured in feetH =
Enter - ACH - Air Changes per Hour - from table ACH =
Amount of CFM required - CFM =

 Air Changes per Hour (ACH)

  6    Light           General Offices, Computer Rooms
  8   Average     Conference Rooms, Break Rooms, Designated Smoking Areas
12   Heavy         Bingo Halls, Extra Smokey Areas

Quantity of Air Cleaners = Amount of CFM required / Air Cleaner CFM Capacity

It is our recommendation that you use the values for Medium capacity for two reasons.

  1. The machines are more efficient at slower speeds and less noisy.
  2. If you need to run them at high speed to keep up with normal conditions, you will not be able to keep up during special events where you would have larger crowds.  Many of our customers report increased customer count just by adding smoke air cleaners to their businesses.
CFM - Amount of CFM required from calculator above CFM =
CFM Capacity - Air Cleaner CFM Capacity - from table below Capacity =
Quantity of Air Cleaners required Quantity =

Model

Low

Medium

High

X-400

DesignAir

175

235

275

285

400

420

CM-12

CM-11

400

400

700

700

850

850

C-12

X-11Q

800

800

1050

1050

1250

1250

Calculators and charts used by permission from Air Quality Engineering, Incorporated.

Click here to see how this affects your Heating and Cooling costs


Handy calculator for converting CFM to FPM

Air Flow (CFM)
Duct Height (inches)
Duct Width (inches)
Total FPM