[LPGramirez]

Could anybody please give som support on how to calculate the Estimated Natural Infiltration Rate (ENIR), when it comes to the determination of the air leakage rates from an enclosure out?

On doing a door fan test so as to check its air changes per hour (ACH), commonly used at 50 Pa of diferential pressure (ACH50), it shall be multiplied by ENIR factor in order to get the spontaneous leakages in natural conditions.

Thank you very much!