Hi,
I share the exact same concern of Josh. If the IAM parameter isn't stated in datasheet and isn't subject to third pary auditing, manufacturers tend to give the highest value possible to gain a "virtual" competitive advantage. From what I have observed from your database, when manufacturers add/update their modules, they either increase slightly their IAM values, or aren't able to do so because they have reached 100%.
In that sense, I have some questions regarding the assessment of this parameter in your software:
What are exactly the min/max values that you consider for this parameter (is 100% the max value?)
What value(s) do you consider for the ASHRAE IAM model's parameter? And do you consider that this parameter depends on the module manufacturing (e.g.: single glazed, AR coating,...)
Have you consider using other models to define the IAM value?
Do you require manufacters to deliver results from the IAM measurements, and does these measurement procedures follow the IEC 61853-2 directive?
Can you please help me clarify this matter?
