I use an installer from HD to put in a large slider. Afterward I read
about energy rebates that are available. However, the required
certificates (NFRC, Energy Star, E4)had been removed from the slider.
Fortunately, my gas company will accept copies of the Andersen catalog
and my order from HD as proof that I had the required window installed.
I'm not sure what will happen with the rebate from my tax return.