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A portable or mobile toilet (colloquial terms: thunderbox, porta-john, porta-potty or portaloo) is any type of toilet that can be moved around, some by one person, some by mechanical equipment such as a truck and crane. Most types do not require any pre-existing services or infrastructure, such as sewerage, and are completely self-contained.
Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate. An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For ...
Various portable toilet technologies are used as public toilets. Portables can be moved into place where and when needed and are popular at outdoor festivals and events. A portable toilet can either be connected to the local sewage system or store the waste in a holding tank until it is emptied by a vacuum truck.
Drain (plumbing) A drain is the primary vessel or conduit for unwanted water or waste liquids to flow away, either to a more useful area, funnelled into a receptacle, or run into sewers or stormwater mains as waste discharge to be released or processed. In most systems, the drain is for discharge of waste fluids, such as the drain in a sink in ...
A bivouac sack (in red) covering a man within a sleeping bag in Benediktenwand, Germany. A bivouac sack is a smaller type of bivouac shelter. Generally it is a portable, lightweight, waterproof shelter, and an alternative to larger bivouac shelters. The main benefit of a bivouac sack shelter is speed of setup and ability to use in a tiny space ...
Examples of on-site heat sinks are the upper atmosphere (night sky), the outdoor air (wind), and the earth/soil. Passive cooling is an important tool for design of buildings for climate change adaptation – reducing dependency on energy-intensive air conditioning in warming environments.