Ceiling fan
A ceiling fan is a mechanical fan mounted on the ceiling of a room or space, usually electrically powered, suspended from the ceiling of a room, that uses hub-mounted rotating blades to circulate air. Ceiling fans typically rotate more slowly than other types of circulating fans, such as electric desk fans. They cool people effectively by introducing slow movement into the otherwise still, hot air of a room. Fans never actually cool air, unlike air-conditioning equipment, they in fact heat the air due to the waste heat from the motor and friction, but use significantly less power (cooling air is thermodynamically expensive). Conversely, a ceiling fan can also be used to reduce the stratification of warm air in a room by forcing it down to affect both occupants' sensations and thermostat readings, thereby improving climate control energy efficiency.
Skyline Solar
The output of the PV system can be increased with improvements in cell efficiency, the use of trackers, concentration, and other more subtle engineering improvements. Tracking provides up to thirty percent more energy per peak Watt compared to fixed tilt (non-tracking) systems. Controlling the temperature of the cells in a CPV system is critical to high energy generation because higher cell temperatures reduce the output of the panel. Skyline Solar uses a combination of tracking, cooling fins, and reflectors to focus light on a single strip of silicon cells and maximize energy production.