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Calcimator

Air Purifier Sizing Calculator

CADR needed from room size and air changes per hour.

Inputs

Results

Recommended CADR (cfm)

120

ACH-based CADR (cfm)96
Room volume (ft³)1,440
Floor area (ft²)180
Units needed (250 CADR each)1
Annual filter cost ($)$80
Annual energy (kWh)438
How to Use This Calculator
  1. Enter Room length (ft), Room width (ft), and Ceiling height (ft).
  2. Set Target air changes/hour.
  3. Review the Recommended CADR (cfm) result.
  4. Use ACH-based CADR (cfm) and Room volume (ft³) to inform your decision.
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