u/Feisty_Charity_7887

My window package is triple pane, Low E-270. Sometimes called Low E-270^(3) However, the laser etching from Cardinal glass shows 180. I'm wondering if that's because it's a 270 and a 180. Which lines up to what I ordered. Or did i get screwed and it's a triple pane with only 1 coating? I do have some double panes, and they show Low E-270. I've heard there is a way to shine line through the glass and see, i can obviously easily tell it's triple pane, but I dont know if i got all the coatings I was supposed to. My order sheet is right, The NFRC sticker on the unit is right, it's just not matching the etching on the glass.