txn, anyone can indeed access the NFRC certified product directory. It is not the easiest site to navigate by any means, but you can access it. You could also ask your salesperson for the CPD number to make the look-up easier. On mfgr literature, generally those that have something to be proud of do showcase it in their lit (ie: Softlite & HiMark), while those that don't have much to brag about will make it more difficult to find those numbers.
You are correct. The other day when I tried to access the CPD, a short questionaire came up and after filling that in and submitting it, I got an access denied response. Today, instead of the questionaire, clicking on "NFRC Products Directory Search" takes me directly to the CPD.
Your advice about getting the CPD number from the salesperson is good. For the Simonton Stormbreaker+ windows I am considering there are 42156 CPDs for the series 07-09 horiz sliders alone. Guess every conceivable combination of styles and options gets a unique CPD.
Your help is appreciated. Thanks