Energy Star is a joint program of the U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy that encourages the use of energy efficient products and practices to save money and protect the environment.
WaterSense, a partnership program by EPA, seeks to protect the future of the country's water supply by offering people a way to use less water with water-efficient products, new homes and services.
During the sales tax holiday, these items will be exempt from sales tax if they have the Energy Star label and have a purchase price of $1,500 or less per item:
Air conditioners
Ceiling fans
Clothes washers
Dehumidifiers
Dishwashers
Doors
Fluorescent light bulbs
Refrigerators
Windows
In addition, these items will be exempt from sales tax if they have the WaterSense label and have a purchase price of $1,500 or less per item:
Bathroom sink faucets
Faucet accessories (such as aerators)
High-efficiency toilets
High-efficiency urinals
Showerheads
Weather- or sensor-based irrigation controllers
The sales tax exemption will not apply to ENERGY STAR or WaterSense products purchased for trade, business or resale.
http://accesswdun.com/article/2013/10/266313