2011 proved to be another successful year for consumers wanting to save money and energy at home. The Energy Savers website  continues to be a great resource for readers interested in learning more about energy efficiency and tips for saving money and energy at home and on the road—and ways to use renewable energy.
Here’s a look at the past year’s 10 most popular Web pages:
10. Demand (Tankless or Instantaneous) Water Heaters 
Demand (tankless or instantaneous) water heaters provide hot water only as it is needed. They don't produce the standby energy losses associated with storage water heaters, which can save you money. Get basic information about how they work, whether a demand water heater might be right for your home, and what criteria to use when selecting the right model.
9. Tips 
By following just a few of the simple tips here in the Energy Savers guide section of the website, you can make your home more comfortable and easier to heat and cool—while you save money. We bring you the latest information on energy-saving, efficient technologies. We even give tips for using clean, renewable energy to power your home.
8. Estimating Appliance and Home Electronic Energy Use 
If you're trying to decide whether to invest in a more energy-efficient appliance or you'd like to determine your electricity loads, you may want to estimate appliance energy consumption.
7. Furnaces and Boilers 
Most U.S. homes are heated with either furnaces or boilers. Furnaces heat air and distribute the heated air through the house using ducts; boilers heat water, providing either hot water or steam for heating. High-efficiency versions of all types of furnaces and boilers are currently available.
6. Radiant Heating 
Radiant heating systems involve supplying heat directly to the floor or to panels in the wall or ceiling of a house. The systems depend largely on radiant heat transfer: the delivery of heat directly from the hot surface to the people and objects in the room via the radiation of heat, which is also called infrared radiation.
5. Solar Water Heaters 
Solar water heaters—also called solar domestic hot water systems—can be a cost-effective way to generate hot water for your home. They can be used in any climate, and the fuel they use—sunshine—is free.
4. Rebates for ENERGY STAR Appliances 
You may be eligible to receive rebates from your state or territory for the purchase of new ENERGY STAR qualified appliances. These rebates are being funded with $300 million from the American Recovery and Reinvestment Act of 2009. Under this program, eligible consumers can receive rebates to purchase new energy-efficient appliances when they replace used appliances.
3. Tax Credits for Energy Efficiency 
If you purchase an energy-efficient product or renewable energy system for your home, you may be eligible for a federal tax credit. This Web page contains an overview of the federal tax credits for energy efficiency that are currently available.
2. Energy Savers Home Page 
The Energy Savers home page includes links to the site's main sections, as well as the Energy Savers Facebook page, Energy Savers blog, and other resources.
1. Approved Energy Efficient Appliance Rebate Programs 
DOE has approved the appliance rebate programs for the states and territories linked or listed on this page as of November 17, 2011. Use the map or table below to find information on the appliance rebates available in your state or territory.
Chris Stewart is a senior communicator at DOE's National Renewable Energy Laboratory, which assists EERE in providing technical content for many of its websites.