Do all Low E windows qualify as energy-efficient?

[Burke6]

I understand it has to be for your principal residence...can't be for new construction...has a lifetime limit of $200 for windows...but I can't find anything that determines whether low E glass is enough to qualify.  Thank you

[DoninGA · Accepted solution]

The window must be Energy Star certified.  You can check the manufacturer's website.

See this Energy Star website - https://www.energystar.gov/about/federal_tax_credits

Federal Tax Credits: Windows, Doors & Skylights

Windows, doors and skylights that earn the ENERGY STAR save energy, improve comfort and help protect the environment.

Tax Credit Amount: 10% of cost
Note: There is a total credit limit of $200 for windows/doors/skylights for all years since 2005.  For purposes of figuring the credit, do not include labor costs.

Requirements:
Must be ENERGY STAR certified