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Things you can do to save energy that cost a little, but not a huge amount of money.
You don't have to break the bank to make serious gains in saving energy. A relatively small investment can reap big dividends.
Fireplace pillow — An open fireplace can be a giant energy waster. Today you can purchase a plastic, inflatable “pillow” that inserts into the chimney to stop heat from escaping. You blow it up (usually just by mouth) and it is easily removable when you want to build a fire. Find out more by contacting your local fireplace dealer or search online for the nearest vendor.
High-efficiency showerheads and water control devices — New showerheads are required to meet a 2.5 gallon-per-minute standard, but there are many older models still in place. If you can squeeze the gallons per minute lower than 2.5, it means you're saving even more money. Also, faucet aerators, including the types that have a shut-off valve built in, can stop waste of water while you're rinsing dishes. And, don’t forget leaky faucets: It doesn't cost much to fix ’em, and they can be big energy wasters.
 Compact fluorescent bulbs — High quality compact fluorescent bulbs come in a variety of models for just about any use. They cost more than incandescent, but they last a whole lot longer … and can save energy. A typical 100-watt incandescent might be rated for 750 hours, while a comparable 25-watt fluorescent is 10,000 hours. The outdoor models are perfect for those porch lights that are on long periods and often awkward to replace.
 Caulking and weatherstripping — A small investment in caulk and weatherstripping around exterior doors or windows can make a difference. Take half a Saturday, your trusty caulk gun, and stop energy waste. Pay attention to pipes, telephone wires, anything at all that enters the house. Make sure they are sealed tight. Pay particular attention to exterior doors. There are a variety of ways to stop air leakage around doors. Your local retailer will have a good choice of threshold weatherstripping, door sweeps and jamb weatherstripping materials. Carefully measure and follow installation instructions carefully.
Water heater wrap — Despite all the advances in better insulated water heaters, it still pays to wrap a water heater, especially if it is located in an unheated space. Special water heater kits are available at retail hardware stores where heaters are sold. Just follow the instructions. (Tip: While you're wrapping up for energy savings, strap up for earthquake safety. Securing your water heater against earthquake tipping is a smart move.)
Thermostat control — You may need to upgrade your existing thermostat to maximize energy efficiency. Newer models have "smart" features built in that can automatically provide night setbacks and other important features. Before purchase, make sure you review your heating system operations manual as there are many types of thermostats and each is tailored to specific systems. If necessary, ask a qualified heating-cooling contractor to install your thermostat to ensure optimum performance.
Summer cool down — A window exhaust fan is a good idea, but a larger attic whole-house exhaust fan, thermostatically controlled, is a real plus in summer. It can help cool things down without central air conditioning.
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