Resources

https://en.wikipedia.org/wiki/Replacement_window

https://www.angieslist.com/articles/single-double-and-triple-pane-windows-explained.htm

https://www.thespruce.com/double-vs-single-hung-windows-1822918

https://en.wikipedia.org/wiki/HVAC

https://www.petro.com/why-petro/resources/articles/the-facts-about-oil-vs-gas-heating

https://en.wikipedia.org/wiki/Motion_detector