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  2. Building airtightness - Wikipedia

    en.wikipedia.org/wiki/Building_airtightness

    Building airtightness (also called envelope airtightness) can be defined as the resistance to inward or outward air leakage through unintentional leakage points or areas in the building envelope. This air leakage is driven by differential pressures across the building envelope due to the combined effects of stack, external wind and mechanical ...

  3. Hooper House (Baltimore County, Maryland) - Wikipedia

    en.wikipedia.org/wiki/Hooper_House_(Baltimore...

    The living room actually has three such doors because there is so much glass. When this home was built, insulated glass was not as common as it is today - especially for windows as large as 8½ by 10 feet - and so all the glazing in the house is 1/4" plate glass, with an R-value of 1. Replacing it all with insulated glass to save energy would ...

  4. Ventilation (architecture) - Wikipedia

    en.wikipedia.org/wiki/Ventilation_(architecture)

    Ventilation (architecture) An ab anbar (water reservoir) with double domes and windcatchers (openings near the top of the towers) in the central desert city of Naeen, Iran. Windcatchers are a form of natural ventilation. [1] Ventilation is the intentional introduction of outdoor air into a space. Ventilation is mainly used to control indoor air ...

  5. Pella (company) - Wikipedia

    en.wikipedia.org/wiki/Pella_(company)

    The Pella Corporation is a privately held window and door manufacturing company headquartered in Pella, Iowa, and with manufacturing and sales operations in a number of locations in the United States . The company was founded in 1925 when Peter Kuyper and his wife Lucille invested $5,000 to buy the Rolscreen Company, a small business that had ...

  6. Andersen Corporation - Wikipedia

    en.wikipedia.org/wiki/Andersen_Corporation

    Andersen Corporation. Andersen Corporation is an international window and door manufacturing enterprise employing 12,000 people at more than thirty manufacturing facilities, logistics centers, and company owned retail locations. Andersen is a private company headquartered in Bayport, Minnesota. [ 1][ 2] Andersen ranked #146 on Forbes List of ...

  7. List of Maryland hurricanes (1950–present) - Wikipedia

    en.wikipedia.org/wiki/List_of_Maryland_hurricanes...

    Hurricane Isabel, one of the most significant storms to affect the region, on September 18, 2003. Since 1950, 144 known hurricanes, tropical storms and tropical depressions have affected the U.S. state of Maryland. Many of these storms also affect the country's capital, Washington, D.C., since the city is located on territory ceded by Maryland.

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