Foundation Vents Calculator

Use this KALK.PRO's foundation vents calculator to determine the number of openings for correct air recirculation inside a strip foundation.

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How can our calculator help?

The calculator of vents in the foundation helps to estimate the number of rectangular or circular openings for ventilation of technical basement spaces. The recommended norm of the ratio of the area of the vents to the total area of the premises under standard conditions is 1/400, for more extreme conditions - 1/100.

  1. Enter the length and width of the side of the foundation.
  2. Choose a standard value.
  3. Select the shape of the vents.
  4. Specify the size of the vents.
  5. Click the "Calculate" button.
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