Working on an energy model which is utilizing LiteZone IGUs with awesome performance U 0.42 / SHGC 0.167.  Of course, when I enter the data, H2K errors.

Any workaround other than increasing the U-value until H2K does not error?

Thanks Toby, did not even consider the legacy option.

As this is an IGU framed into the wall, so essentially no frame.  In this circumstance, if it was a Passive House, we would get into the details of thermal bridging due to installation. 

Though I have used their whole glass values, in theory we should be using center of glass as well as glass edge (spacer), so my assumption is that the spacer is included within their whole IGU performance numbers.