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  1. Windows & Skylights

    https://greenhome.osu.edu/windows-skylights-and-roofs

    energy-efficiency performance of these fixtures. Below is an example of a NFRC label.    Image source: ... 9        Image source: energy.gov Awning Windows that are hinged at the top of the window frame, and ...

  2. Building Location and Orientation

    https://greenhome.osu.edu/building-location-and-orientation

    the sun can save between 10-40% on home heating. 1      Image source:  www.nachi.org    Typical Design ...

  3. Reduced Air Infiltration

    https://greenhome.osu.edu/reduced-air-infiltration

    around windows, doors, and openings for wiring, plumbing, and ducts. Image source: www.yourhome.gov.au ...

  4. Geothermal

    https://greenhome.osu.edu/renewables/geothermal

    and Depth" by builditsolar.com- Discussion of soil temperature.  Image sources ...