
Approximately all historical buildings were naturally ventilated. With more knowledge of the cost and environmental influences of energy usage, natural ventilation has become an increasingly noteworthy method.

Our ancestors didn’t have artificial lighting. For thousands of years, civilisation revolved around daylight, and many religions worshipped the sun as the source of all life.

If you plan to install skylights in your home to allow more light and make it energy efficient, that's a significant home improvement to consider.