identifying old sealed unit (Low e?)

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Jungle
Posts: 7
Joined: Thu Mar 18, 2021 2:31 pm

identifying old sealed unit (Low e?)

#1 Post by Jungle »

I have some 32 year old Andersen windows with double pane glass units. I am trying to determine if they had a low e coating. The etchings on the glass are

IGMAC
R-Plus
WPG
1989

Thanks for any insight.

Jim
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