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Exfiltration
Exfiltration refers to the leakage of wastewater into soil and groundwater through faulty joints, damaged pipes, around manholes, etc.
Expansion
Expansion is an expression used in a cooling plant. It relates to the temperature and the process that brings the refrigerant from the condenser side to the evaporator side in the cooling plant.
Expansion of fluid
When a liquid is heated it expands, i.e. its density falls as temperature increases. The temperature of a liquid in a heating system will vary significantly over time.
Fan
A fan is a device with wings or an impeller that rotates by means of an electric motor. Upon the rotation of the wings or impeller, air is set in motion. The rotation causes the mechanical work to be transferred to the air.
Fan coil
A fan coil is used to heat or cool down air in many different types of locations, for example; in production areas in the food industry, warehouses, offices, supermarkets, etc.Since it does not have any ductwork, a fan coil unit is used to control the temperature only in the space where it is installed.
Fieldbus
A fieldbus is the information highway that connects the components in a BMS system to allow monitoring and controlling of air-conditioning systems, heating systems, lighting systems, ventilation, wastewater systems etc.
Fin spacing
Fin spacing is the distance between fins which are used on fan coils, air coolers, dry coolers, evaporators and condensers. Increasing or decreasing fin spacing has a major impact on the coil performance.
Fire extinguishing systems
Fire extinguishing systems are a common expression for systems using different medias to suppress- or extinguish fires in buildings. The medias can be water, foam, gas or chemicals.
Fire hazard classification
The hazard class (LH, OH, HH) to which sprinkler system is to be designed, will determine the characteristics of the fire sprinkler installation in regards of specification of water supply, number of fire pumps, number of sprinklers etc.
Fire hose reel system
Fire hose reels are located at strategic places in buildings to provide a reasonably accessible and controlled supply of water for fire extinguishing.