A tax credit that's helped Georgia businesses boost sales is about to expire.

There's now about a month left to take advantage of a stimulus-funded rebate.

The $1,500 tax credit is aimed at helping homeowners recoup the costs of making energy-efficient renovations, like windows, water heaters and air-conditioners

Gill Sasser of Savannah Window World says, his business is up about 20% this year.

"Almost all calls are inquiring about that program," Sasser says. "It's been a very nice boost for our business."

But with little time left, it might be too late for some repairs.

"We've got basically five weeks left in the year and it takes about four weeks to get them from the factory," Sasser says. "So I'm having to to be completely honest with them and tell them right up front that I cannot promise that these will be installed by December 31st."

The tax credit was part of the American Recovery and Reinvestment Act and will expire at the end of the year unless Congress renews it.

All installations must be made by December 31st.

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