The sales tax break applies to Energy Star-qualified air conditioners priced at $6,000 or less.

flickr - from AC Home X

It also applies to refrigerators priced at $2,000 or less; ceiling fans; fluorescent light bulbs; dishwashers; dehumidifiers; and clothes washers.

Clothes dryers are NOT Energy Star certified.

Visit http://www.window.state.tx.us/taxinfo/taxpubs/tx96_1331/ , for more information.