Calculate Room Volume then...

Hello All,

           I am trying to calucate room air change per hour (ACH) in the ACH_Exhaust field.

The formula is ACH = Total_Supply * 60 / Rm_Volume

To do so I need calculate

First: Rm_Volume by multiplying Rm_length, Rm_Width, and Rm_Height. Rm_Volume will be my denominator. The used the product feature to get Rm_Volume. For nominator I have a field called Total_Supply.

then ACH = Total_Supply *60 / Rm_Volume.

It works. however when the room diamension field are blank, Adobe displayed a warning, "The Value entered does not match the format of the field [ ACH_Exhaust] message.

My question is, the denominator Rm_Volume fiield remains 0 until a value entered, how do I by pass the Warning?

Thank you,

Petros