Five Green Fixes for Your Home

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4. Watch your water

Homeowners who go through all the trouble of sealing their ducts won't want to waste water either. And the energy expended in keeping water hot also drains the pocketbook. Anyone can take shorter showers or run the dishwasher less often, but there are also devices that can help. For one thing, inexpensive flow reducers can reduce a faucet or shower head's output without sacrificing water pressure.

Less known is a device called the Metlund Hot Water D'MAND System put out by Costa Mesa (Calif.)-based Advanced Conservation Technology. The device recirculates water from the hot water pipes to ensure that bathers are never running the faucet waiting for hot water. As with so many tricks in the green arena, the savings are gradual but, Johnston says, real.

Dual flush toilets could also become more common. Available from several manufacturers, they allow users to decide flush intensity depending on their needs. Even with the amount of water expended per flush shrinking in normal toilets, Smith says families will quickly recoup their money with one of these commodes.

5. Upgrade windows

No, we're not talking about ditching XP for Vista. The cost savings for energy-efficient windows aren't quite as dramatic as some of the other suggestions here, but Johnston says they will have the most marked affect on residents' quality of life. Of these, the best improvement are so called low-e coatings, transparent layers of metallic oxides applied to window panes that help maintain the desired room temperature. Available in varieties for different climates, depending on if someone wants to keep the heat in or out, Johnston says they are a "noticeable change aesthetically and in your daily experience of being in your house."

According to the American Council for an Energy-Efficient Economy, there are additional ways to improve windows. Panes with multiple glazing insulate markedly better than those with only individual layers. Likewise, having two panes of glass works better than one. And even some folks savvy enough to have two panes of glass won't know that a wider pocket of air between them is the next smart step.

As with every aspect of remodeling, when looking to improve a house's green credibility an owner can go as far as their heart and wallet can take them. But the odds are that some low-key, low-cost additions can have a beneficial effect on your bills.

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Halperin is a reporter for BusinessWeek.com in New York.