Passive
Solar Energy Passive solar energy does not harm the ozone layer and is
therefore  the most preferred source of solar energy. Solar is free energy that's
completely clean and as abundant as sunlight. Passive solar systems have zero or little operating costs, emit
no toxic gases, and are low on maintenance costs, as such, they should be given full consideration as a
renewable source of energy.
Passive solar energy is much simpler to set up, and thus is used by many people who are just starting to employ
solar power. Many of these people don't upgrade because passive solar energy suits their needs very
well.
Passive solar energy is a term used to describe the method of using the sun without specialized panels.
This might include simple solar water heating, smart window installation, or specialized insulation in your
home.
Passive solar energy is not about mechanical implementations. Passive solar energy refers to the
ability to harness energy from the sun without an external input of energy.
Active solar power generally involves the input of energy and employs supplementary devices such as pumps, or
air blowers.
Passive solar power is used by a more primitive means and usually without electrical components such as a
conventional solar panel used in active solar energy.
Passive solar power is also used to describe the technology used to reduce summer cooling requirements, known as
passive cooling.
 Passive cooling systems are used which are capable of cooling at very
low costs (natural cooling). These types of systems can be easily retrofitted.
Passive cooling refers to technologies or design features used to cool buildings naturally. The term “passive”
implies that energy-consuming mechanical components like pumps and fans are not used.
Passive cooling uses non-mechanical methods of reducing heat gain by increasing air circulation and decreasing
solar radiation absorbed by the building.
Today, these techniques are being perfected and widely used as people seek ways to save energy.
Passive cooling does not require any more energy than a pair of light bulbs. Passive cooling is normally
sufficient, but if necessary, extra cooling can be obtained by using a compressor.
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