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Other stories by Gary Nelson

  • Are Your Houses Too Tight?

    Tight construction is now standard practice, and though it makes the house more energy-efficient, it can create serious indoor air quality problems. Three energy specialists team up to explain how to test for tightness and improve ventilation.

  • Finding the Flaws in Superinsulation

    The performance of many energy-efficient houses falls short of expectations. An in-depth field study of 144 houses shows why.