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If 10,000 Biters plug all the holes in their insulation, it'll have the CO2-reducing effect of planting 1,538,461 trees.

Lots of room for leaks: The Winchester Mystery House in San Jose features 47 fireplaces, 17 chimneys, and 1,257 window frames.

Ugly Duct Leaks - Home Improvement Week

The Bite:

Do your energy bills seem unusually large (and clumsy)? Might just be growing pains: Many SF homes are drafty thanks to post-1906 quake construction methods (replacing windows can be expensive and doesn't always help), but the home-building pros at Sustainable Spaces specialize in rummaging through your crawlspaces to find and fix holes in your insulation, and replace aging materials that wreck your abode's energy efficiency. Let them take care of the work, reducing your monthly bills (justifying a new pair of shoes) and your drain on finite resources like oil as you transform your house into an energy-efficient swan.

Wanna Try?

Sustainable Spaces, 221 Fourteenth St. (800-645-1675).

View this tip online at http://www.idealbite.com/tiplibrary/sanfrancisco/ugly_duct_leaks_home_improvement_week

All editorial suggestions in this tip are the result of testing and a preference for the tip topic. No advertiser has paid to have its company referenced in the tip.