The energy source with the highest net energy ratio for space heating is
A) Oil
B) active solar
C) passive solar
D) electric resistance heating
E) Wind

Question

Quizplus · Accepted Answer

Passive solar heating uses the sun's energy directly to heat a building through design features such as south-facing windows and thermal mass materials. Since it does not require any external energy input, it has the highest net energy ratio for space heating. Other energy sources listed, such as oil and electric resistance heating, require an external input of energy and therefore have a lower net energy ratio. Active solar and wind could also be efficient sources, but they require more sophisticated technology and infrastructure, and therefore may not have as high a net energy ratio as passive solar.

The Energy Source with the Highest Net Energy Ratio for Space