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.
Popcorn ceiling
Since the mid-2000s, the popularity for textured popcorn ceilings has diminished significantly across North America. A movement towards more modern, clean lined design features has influenced home imporvement professionals to provide popcorn ceiling removal services. This feature has a multitude of benefits over the textured ceiling, such as its association with a high-end asthetic, it multiplies natural light throughout the space, it does not harbor dust and allergens (only to be re-introduced into the air), easier patching and touching up after a drywall repair, etc. The process can be difficult to execute for the average do-it-yourself home owner, as it requires skim-coating techniques often only mastered by experienced plasterers. Several coats should be adminstered to achieve a level smooth surface ready to be sealed and painted. The final cost is usually quite high, thus being less favorable to new construction builders, and sourced by homeowners looking to add value to their properties.