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How are ASHRAE design mean coincident variables calculated?

I’m having some trouble finding documentation on how this is done. I’ve gone through the HoF but I couldn’t find much on specific methods.

For example what I’m trying to get at: let’s say that the 0.4% condition temperature somewhere is 90F. In the ordered distribution of temperatures there are sure to be more than one hour in the measurement period that is 90, so which coincident WB, for example, is chosen? I assume it must be the max, or an average or something.

Thanks

How are ASHRAE design mean coincident variables calculated?

I’m having some trouble finding documentation on how this is done. I’ve gone through the HoF but I couldn’t find much on specific methods.

For example what I’m trying to get at: let’s say that the 0.4% condition temperature somewhere is 90F. In the ordered distribution of temperatures there are sure to be more than one hour in the measurement period that is 90, so which coincident WB, for example, is chosen? I assume it must be the max, or an average or something.

Thanks