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  2. List of roof shapes - Wikipedia

    en.wikipedia.org/wiki/List_of_roof_shapes

    Unlike the Second Empire, where upper story windows were contained within dormers, Neo-Mansard roofs have window openings cut through the steep slope of the lower roof, forming a recessed window. Gambrel, curb, kerb: A roof similar to a mansard but sloped in one direction rather than both. Bell-cast (sprocketed, flared): A roof with the shallow ...

  3. Ridge vent - Wikipedia

    en.wikipedia.org/wiki/Ridge_vent

    A ridge vent is a type of vent installed at the peak of a sloped roof which allows warm, humid air to escape a building's attic. Ridge vents are most common on shingled residential buildings. Ridge vents are also used in industrial warehouses to help release the hot air and help circulate comfortable air inside the building .

  4. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    is the heat recovery efficiency - (typically around 0.8 with heat recovery and 0 if no heat recovery device is used). The temperature differential needed between indoor and outdoor air for mechanical ventilation with heat recovery to outperform natural ventilation in terms of overall energy efficiency can therefore be calculated as:

  5. Try These DIY Patio Cover Ideas to Create Your Dream ... - AOL

    www.aol.com/try-diy-patio-cover-ideas-220900499.html

    Consider adding a patio cover so you and your guests can have it made in the shade. Covering your patio is one of the easiest ways to instantly transform your yard on any budget.

  6. A Green Roof Could Slash Your Energy Bill in All This Heat - AOL

    www.aol.com/green-roof-could-slash-energy...

    Green roof costs vary widely depending on the type of green roof, the size and scale of the project, and where you live. HomeAdvisor estimates a green roof costs from $12,000 to $40,000, or $10 to ...

  7. Heat and smoke vent - Wikipedia

    en.wikipedia.org/wiki/Heat_and_smoke_vent

    The majority of guidance available for design of heat and smoke building vents installed in buildings is restricted to nonsprinklered, single-story buildings. [4] This is partly a historical consequence of the installation of heat and smoke vents following the August 1953 General Motors, Livonia, MI major fire in a nonsprinklered manufacturing facility which effectively stopped the production ...

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